Recipes: make cwd default to slave_build

scripts/slave/recipes/libvpx/android_unittests.expected/basic_linux_64.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport os, sys, shutil\nroot = sys.argv[1]\nnuke_dirs = sys.argv[2:]\nfor fname in os.listdir(root):\n  path = os.path.join(root, fname)\n  if os.path.isfile(path):\n    os.unlink(path)\n  elif fname in nuke_dirs:\n    shutil.rmtree(path)\n",
       "[SLAVE_BUILD]",
       "libs",
       "obj",
       "armeabi-v7a"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "clean_build",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@@@@",
       "@@@STEP_LOG_LINE@python.inline@import os, sys, shutil@@@",
       "@@@STEP_LOG_LINE@python.inline@root = sys.argv[1]@@@",
       "@@@STEP_LOG_LINE@python.inline@nuke_dirs = sys.argv[2:]@@@",
       "@@@STEP_LOG_LINE@python.inline@for fname in os.listdir(root):@@@",
       "@@@STEP_LOG_LINE@python.inline@  path = os.path.join(root, fname)@@@",
       "@@@STEP_LOG_LINE@python.inline@  if os.path.isfile(path):@@@",
       "@@@STEP_LOG_LINE@python.inline@    os.unlink(path)@@@",
       "@@@STEP_LOG_LINE@python.inline@  elif fname in nuke_dirs:@@@",
       "@@@STEP_LOG_LINE@python.inline@    shutil.rmtree(path)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/git_setup.py",
       "--path",
       "[SLAVE_BUILD]/android_tools",
       "--url",
       "https://chromium.googlesource.com/android_tools"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "git setup"
   },
   {
     "cmd": [
       "git",
       "retry",
       "fetch",
       "origin",
       "master",
       "--recurse-submodules"
@@ skipping 45 matching lines @@
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/git_setup.py",
       "--path",
       "[SLAVE_BUILD]/libvpx",
       "--url",
       "https://chromium.googlesource.com/webm/libvpx"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "git setup (2)"
   },
   {
     "cmd": [
       "git",
       "retry",
       "fetch",
       "origin",
       "master",
       "--recurse-submodules"
@@ skipping 63 matching lines @@
       "--enable-vp9-encoder",
       "--enable-decode-perf-tests",
       "--enable-external-build",
       "--enable-vp8-decoder",
       "--enable-vp9-decoder",
       "--enable-encode-perf-tests",
       "--disable-realtime-only",
       "--sdk-path=[SLAVE_BUILD]/android_tools/ndk",
       "--target=armv7-android-gcc"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "configure"
   },
   {
     "cmd": [
       "[SLAVE_BUILD]/android_tools/ndk/ndk-build",
       "APP_BUILD_SCRIPT=[SLAVE_BUILD]/libvpx/test/android/Android.mk",
       "APP_ABI=armeabi-v7a",
       "APP_PLATFORM=android-14",
       "APP_OPTIM=release",
       "APP_STL=gnustl_static"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "NDK_PROJECT_PATH": "[SLAVE_BUILD]"
     },
     "name": "ndk-build"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[SLAVE_BUILD]/libvpx/test/android/get_files.py",
       "-i",
       "[SLAVE_BUILD]/libvpx/test/test-data.sha1",
       "-o",
       "[SLAVE_BUILD]/test_data",
       "-u",
       "http://downloads.webmproject.org/test_data/libvpx"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "get_files"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/android/transfer_files.py",
       "[SLAVE_BUILD]/android_tools/sdk/platform-tools/adb",
       "/data/local/tmp",
       "[SLAVE_BUILD]/test_data"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "transfer_files"
   },
   {
     "cmd": [
       "[SLAVE_BUILD]/android_tools/sdk/platform-tools/adb",
       "push",
       "[SLAVE_BUILD]/libs/armeabi-v7a",
       "/data/local/tmp"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "push_so"
   },
   {
     "cmd": [
       "python",
       "-u",
       "\nimport sys, subprocess, time\nout = open(sys.argv[1], \"w\")\np = subprocess.Popen(sys.argv[2:], stdout=out)\nwhile p.poll() is None:\n    print \"Still working\"\n    time.sleep(60)\nprint \"done\"\nsys.exit(p.returncode)\n",
       "/path/to/tmp/",
       "[SLAVE_BUILD]/android_tools/sdk/platform-tools/adb",
       "shell",
       "LD_LIBRARY_PATH=/data/local/tmp",
       "LIBVPX_TEST_DATA_PATH=/data/local/tmp",
       "/data/local/tmp/vpx_test",
       "--gtest_filter=-*Large*"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "adb_wrap",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@@@@",
       "@@@STEP_LOG_LINE@python.inline@import sys, subprocess, time@@@",
       "@@@STEP_LOG_LINE@python.inline@out = open(sys.argv[1], \"w\")@@@",
       "@@@STEP_LOG_LINE@python.inline@p = subprocess.Popen(sys.argv[2:], stdout=out)@@@",
       "@@@STEP_LOG_LINE@python.inline@while p.poll() is None:@@@",
       "@@@STEP_LOG_LINE@python.inline@    print \"Still working\"@@@",
       "@@@STEP_LOG_LINE@python.inline@    time.sleep(60)@@@",
       "@@@STEP_LOG_LINE@python.inline@print \"done\"@@@",
       "@@@STEP_LOG_LINE@python.inline@sys.exit(p.returncode)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "[SLAVE_BUILD]/libvpx/test/android/scrape_gtest_log.py",
       "--output-json",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "scrape_logs",
     "stdin": "This is text with json inside normally",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"decodeTimeSecs\": 29.344307, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"framesPerSecond\": 609.82868, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"threadCount\": 1, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"totalFrames\": 17895, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"type\": \"decode_perf_test\", @@@",
@@ skipping 14 matching lines @@
       "@@@STEP_LOG_LINE@json.output@]@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[perf_dashboard]/resources/post_json.py"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "perf dashboard post",
     "stdin": "{\"data\": [{\"bot\": \"libvpx-bot\", \"buildername\": \"Nexus 5 Builder\", \"buildnumber\": \"75\", \"master\": \"client.libvpx\", \"masterid\": \"client.libvpx\", \"revision\": \"42\", \"test\": \"libvpx/decode/perf_test/nexus_5/vp90-2-bbb_426x240_tile_1x1_180kbps.webm_1\", \"units\": \"fps\", \"value\": 609.82868}, {\"bot\": \"libvpx-bot\", \"buildername\": \"Nexus 5 Builder\", \"buildnumber\": \"75\", \"master\": \"client.libvpx\", \"masterid\": \"client.libvpx\", \"revision\": \"42\", \"test\": \"libvpx/encode/perf_test/fps/nexus_5/vp90-2-bbb_640x360_tile_1x2_337kbps.webm_5\", \"units\": \"fps\", \"value\": 317.976883}, {\"bot\": \"libvpx-bot\", \"buildername\": \"Nexus 5 Builder\", \"buildnumber\": \"75\", \"master\": \"client.libvpx\", \"masterid\": \"client.libvpx\", \"revision\": \"42\", \"test\": \"libvpx/encode/perf_test/minPsnr/nexus_5/vp90-2-bbb_640x360_tile_1x2_337kbps.webm_5\", \"units\": \"dB\", \"value\": 43.5}], \"url\": \"https://chromeperf.appspot.com/add_point\"}"
   }
 ]