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',
+          parent_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(
           category='cq',
           master='tryserver.v8',
           patch_project='v8',
           patch_storage='rietveld',
           reason='CQ',
           revision='12345',
           try_job_key='1234',
       )
 
     return test
 
   def fail(self, step_name, variant='default'):
     return self.override_step_data(
         step_name, self.failures_example(variant=variant))