Recipes: make cwd default to slave_build

scripts/slave/recipes/blink_android_trybot.expected/bot_update_on.json

Index: scripts/slave/recipes/blink_android_trybot.expected/bot_update_on.json
diff --git a/scripts/slave/recipes/blink_android_trybot.expected/bot_update_on.json b/scripts/slave/recipes/blink_android_trybot.expected/bot_update_on.json
index 74471ac9f6d342cc4c4231e2e610f49adb41399a..bac74d2314aca9f6cdc0f3161d57e520a63cbfb9 100644
--- a/scripts/slave/recipes/blink_android_trybot.expected/bot_update_on.json
+++ b/scripts/slave/recipes/blink_android_trybot.expected/bot_update_on.json
@@ -29,6 +29,7 @@
       "--revision",
       "src/third_party/WebKit@HEAD"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
@@ -75,6 +76,7 @@
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_CHROMIUM_NO_ACTION": "1",
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
@@ -98,6 +100,7 @@
       "[BUILD]/goma",
       "//out/Release"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "Generate build files"
   },
   {
@@ -118,6 +121,7 @@
       "--",
       "blink_tests"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
@@ -134,6 +138,7 @@
       "\nimport os, sys\nfrom common import chromium_utils\n\nfor p in [os.path.join(sys.argv[1], x) for x in os.listdir(sys.argv[1])]:\n  if os.path.isdir(p):\n    chromium_utils.RemoveDirectory(p)\n  else:\n    os.unlink(p)\n",
       "[SLAVE_BUILD]"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "rmcontents slave build directory",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -178,6 +183,7 @@
       "--revision",
       "src/third_party/WebKit@HEAD"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "bot_update - clean",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
@@ -224,6 +230,7 @@
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_CHROMIUM_NO_ACTION": "1",
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
@@ -247,6 +254,7 @@
       "[BUILD]/goma",
       "//out/Release"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "Generate build files (2)"
   },
   {
@@ -267,6 +275,7 @@
       "--",
       "blink_tests"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },