V8 Buildbot: Stage mac asan for swarming.

scripts/slave/recipe_modules/v8/builders.py

Index: scripts/slave/recipe_modules/v8/builders.py
diff --git a/scripts/slave/recipe_modules/v8/builders.py b/scripts/slave/recipe_modules/v8/builders.py
index 76510923ddf26dce646e83e66894c3fcd8ff69ce..1ce9da9d05eb0202764a0a257695d0c828acb8c0 100644
--- a/scripts/slave/recipe_modules/v8/builders.py
+++ b/scripts/slave/recipe_modules/v8/builders.py
@@ -2250,14 +2250,14 @@ BUILDERS = {
         'testing': {'platform': 'linux'},
       },
       'v8_swarming_staging': {
-        'chromium_apply_config': ['v8_ninja', 'clang', 'goma'],
+        'chromium_apply_config': ['v8_ninja', 'clang', 'asan', 'goma'],
         'v8_config_kwargs': {
           'BUILD_CONFIG': 'Release',
-          'TARGET_BITS': 32,
+          'TARGET_BITS': 64,
         },
         'bot_type': 'builder_tester',
         'enable_swarming': True,
-        'tests': [V8Testing, Test262, Mozilla, SimdJs],
+        'tests': [V8Testing_2],
         'swarming_dimensions': {
           'os': 'Mac-10.9',
           'cpu': 'x86-64',