Recipes: make cwd default to slave_build

scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_linux_cast_shell_linux.json

Index: scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_linux_cast_shell_linux.json
diff --git a/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_linux_cast_shell_linux.json b/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_linux_cast_shell_linux.json
index 1d2ba7d5dea2007459011942db7dbc4edaeebb77..aea6f5cabf65bb20a8f870c3e5e348d4695d54d0 100644
--- a/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_linux_cast_shell_linux.json
+++ b/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_linux_cast_shell_linux.json
@@ -27,6 +27,7 @@
       "--revision",
       "src@HEAD"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
@@ -73,6 +74,7 @@
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_DEFINES": "chromecast=1 clang=1 component=static_library dcheck_always_on=1 fastbuild=1 gomadir='[BUILD]/goma' target_arch=x64 use_goma=1"
     },
@@ -86,6 +88,7 @@
       "[SLAVE_BUILD]/src/testing/buildbot/chromium.linux.json",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "read test spec",
     "~followup_annotations": [
       "@@@STEP_TEXT@path: [SLAVE_BUILD]/src/testing/buildbot/chromium.linux.json@@@",
@@ -108,6 +111,7 @@
       "--properties",
       "{\"buildername\": \"cast_shell_linux\", \"buildnumber\": 571, \"mastername\": \"tryserver.chromium.linux\", \"slavename\": \"TestSlavename\", \"target_platform\": \"linux\"}"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "get compile targets for scripts",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{}@@@",
@@ -137,6 +141,7 @@
       "[SLAVE_BUILD]/src/testing/buildbot/trybot_analyze_config.json",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "read filter exclusion spec",
     "~followup_annotations": [
       "@@@STEP_TEXT@path: 'testing/buildbot/trybot_analyze_config.json'@@@",
@@ -159,6 +164,7 @@
       "-u",
       "import sys; sys.exit(0)"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "analyze",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@excluded_files@foo.cc (regex = 'f.*')@@@",
@@ -179,6 +185,7 @@
       "-u",
       "[BUILD]/scripts/slave/cleanup_temp.py"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "cleanup_temp"
   },
   {
@@ -201,6 +208,7 @@
       "All",
       "chromium_builder_tests"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "compile (with patch)"
   }
 ]