[build] Conditionally print to stdout on Android

infra/mb/mb_config.pyl

 # Copyright 2016 The V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   # This is a map of buildbot master names -> buildbot builder names ->
   # config names (where each config name is a key in the 'configs' dict,
   # below). MB uses this dict to look up which config to use for a given bot.
   # Bots are ordered by appearance on waterfall.
   'masters': {
@@ skipping 371 matching lines @@
       'gyp', 'release', 'x86', 'goma', 'minimal_symbols', 'shared', 'swarming',
       'v8_snapshot_none'],
     'gyp_release_x86_predictable': [
       'gyp', 'release_bot', 'x86', 'v8_enable_verify_predictable'],
     'gyp_release_x86_trybot': [
       'gyp', 'release_trybot', 'x86', 'swarming'],
   },
 
   'mixins': {
     'android': {
-      'gn_args': 'target_os="android"',
-      'gyp_defines': 'OS=android',
+      'gn_args': 'target_os="android" v8_android_log_stdout=true',
+      'gyp_defines': 'OS=android v8_android_log_stdout=1',
     },
 
     'arm': {
       'gn_args': 'target_cpu="arm"',
       'gyp_defines': 'target_arch=arm',
     },
 
     'arm64': {
       'gn_args': 'target_cpu="arm64"',
       'gyp_defines': 'target_arch=arm64',
@@ skipping 256 matching lines @@
       'gn_args': 'target_cpu="x64"',
       'gyp_defines': 'target_arch=x64',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
       'gyp_defines': 'target_arch=ia32',
     },
   },
 }