V8: Show build environment in failure logs

scripts/slave/recipe_modules/v8/test_api.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Exposes the builder and recipe configurations to GenTests in recipes.
 
 import re
 
 from recipe_engine import recipe_test_api
 from . import builders
@@ skipping 350 matching lines @@
             parent_buildername=parent_buildername,
             revision='20123',
             **kwargs
         ) +
         self.m.platform(
             bot_config['testing']['platform'],
             v8_config_kwargs.get('TARGET_BITS', 64),
         )
     )
     if parent_buildername:
-      test += self.m.properties(parent_got_revision='54321')
+      test += self.m.properties(
+          parent_got_revision='54321',
+          build_environment={
+            'useful': 'envvars', 'from': 'the', 'parent': 'bot'},
+      )
       if bot_config.get('enable_swarming'):
         # Assume each tester is triggered with the required hashes for all
         # tests.
         test += self.m.properties(
           parent_got_swarming_client_revision='[dummy swarming client hash]',
           swarm_hashes=self._make_dummy_swarm_hashes(bot_config),
         )
 
     if mastername.startswith('tryserver'):
       test += self.m.properties(
@@ skipping 24 matching lines @@
 
   @recipe_test_api.mod_test_data
   @staticmethod
   def wrong_results(wrong_results):
     return wrong_results
 
   def __call__(self, test_failures=False, wrong_results=False, flakes=False):
     return (self.test_failures(test_failures) +
             self.wrong_results(wrong_results) +
             self.flakes(flakes))