Recipes: make cwd default to slave_build

scripts/slave/recipe_modules/gclient/example.expected/basic.json

Index: scripts/slave/recipe_modules/gclient/example.expected/basic.json
diff --git a/scripts/slave/recipe_modules/gclient/example.expected/basic.json b/scripts/slave/recipe_modules/gclient/example.expected/basic.json
index b3cb48521d7abd989a5aba275bc195b66f60cf22..db4631fe099a7f7dd7dc41fd316592738a6e5ad7 100644
--- a/scripts/slave/recipe_modules/gclient/example.expected/basic.json
+++ b/scripts/slave/recipe_modules/gclient/example.expected/basic.json
@@ -8,6 +8,7 @@
       "--spec",
       "cache_dir = '[ROOT]/git_cache'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': True, 'name': 'src', 'url': 'https://chromium.googlesource.com/chromium/src.git'}]"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "gclient setup"
   },
   {
@@ -28,6 +29,7 @@
       "--output-json",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "gclient sync",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -51,6 +53,7 @@
       "user.name",
       "local_bot"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "gclient recurse (git config user.name)"
   },
   {
@@ -64,6 +67,7 @@
       "user.email",
       "local_bot@example.com"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "gclient recurse (git config user.email)"
   },
   {
@@ -115,6 +119,7 @@
       "\nimport os, sys\n\nbuild_path = sys.argv[1]\nif os.path.exists(build_path):\n  for (path, dir, files) in os.walk(build_path):\n    for cur_file in files:\n      if cur_file.endswith('index.lock'):\n        path_to_file = os.path.join(path, cur_file)\n        print 'deleting %s' % path_to_file\n        os.remove(path_to_file)\n",
       "[SLAVE_BUILD]"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "cleanup index.lock",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@@@@",