Recipes: make cwd default to slave_build

scripts/slave/recipes/webrtc/standalone.expected/client_webrtc_linux64_release.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/bot_update.py",
       "--master",
       "client.webrtc",
       "--builder",
       "Linux64 Release",
       "--slave",
       "slavename",
       "--spec",
       "cache_dir = None\nsolutions = [{'deps_file': 'DEPS', 'managed': True, 'name': 'src', 'url': 'https://chromium.googlesource.com/external/webrtc'}, {'deps_file': 'DEPS', 'managed': True, 'name': 'webrtc-limited', 'url': 'https://chrome-internal.googlesource.com/chrome/deps/webrtc-limited'}]",
       "--root",
       "src",
       "--revision_mapping_file",
       "{\"src\": \"got_revision\"}",
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
       "src@12345"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"did_run\": true, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"patch_failure\": false, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"patch_root\": \"src\", @@@",
       "@@@STEP_LOG_LINE@json.output@  \"properties\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"got_revision\": \"f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9\", @@@",
       "@@@STEP_LOG_LINE@json.output@    \"got_revision_cp\": \"refs/heads/master@{#170242}\"@@@",
       "@@@STEP_LOG_LINE@json.output@  }, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"root\": \"src\", @@@",
       "@@@STEP_LOG_LINE@json.output@  \"step_text\": \"Some step text\"@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@",
       "@@@SET_BUILD_PROPERTY@got_revision@\"f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9\"@@@",
       "@@@SET_BUILD_PROPERTY@got_revision_cp@\"refs/heads/master@{#170242}\"@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[webrtc]/resources/cleanup_files.py",
       "[SLAVE_BUILD]/src/out"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "clean test output files"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/cleanup_temp.py"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "cleanup_temp"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_DEFINES": "component=static_library dcheck_always_on=1 gomadir='[BUILD]/goma' target_arch=x64 use_goma=1"
     },
     "name": "gclient runhooks"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/compile.py",
       "--target",
       "Release",
       "--src-dir",
       "[SLAVE_BUILD]/src",
       "--build-tool",
       "ninja",
       "--compiler",
       "goma",
       "--goma-dir",
       "[BUILD]/goma",
       "--",
       "All"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "compile"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=audio_decoder_unittests",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/audio_decoder_unittests",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "audio_decoder_unittests"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=common_audio_unittests",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/common_audio_unittests",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "common_audio_unittests"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=common_video_unittests",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/common_video_unittests",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "common_video_unittests"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=libjingle_media_unittest",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/libjingle_media_unittest",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "libjingle_media_unittest"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=libjingle_p2p_unittest",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/libjingle_p2p_unittest",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "libjingle_p2p_unittest"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=libjingle_peerconnection_unittest",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/libjingle_peerconnection_unittest",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "libjingle_peerconnection_unittest"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=modules_tests",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/modules_tests",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "modules_tests"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=modules_unittests",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/modules_unittests",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "modules_unittests"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=rtc_unittests",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/rtc_unittests",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "rtc_unittests"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=system_wrappers_unittests",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/system_wrappers_unittests",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "system_wrappers_unittests"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=test_support_unittests",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/test_support_unittests",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "test_support_unittests"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=tools_unittests",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/tools_unittests",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "tools_unittests"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=video_engine_core_unittests",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/video_engine_core_unittests",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "video_engine_core_unittests"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=video_engine_tests",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/video_engine_tests",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "video_engine_tests"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
       "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux64 Release\", \"buildnumber\": 1337, \"mastername\": \"client.webrtc\", \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--test-type=voice_engine_unittests",
       "--builder-name=Linux64 Release",
       "--slave-name=slavename",
       "--build-number=1337",
       "--run-python-script",
       "[SLAVE_BUILD]/src/third_party/gtest-parallel/gtest-parallel",
       "[SLAVE_BUILD]/src/out/Release/voice_engine_unittests",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "voice_engine_unittests"
   }
 ]