MB: Add Chromium Linux Goma GCE Staging

tools/mb/mb_config.pyl

 # Copyright 2015 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.
 
 # This is a .pyl, or "Python Literal", file. You can treat it just like a
 # .json file, with the following exceptions:
 # * all keys must be quoted (use single quotes, please);
 # * comments are allowed, using '#' syntax; and
 # * trailing commas are allowed.
 
@@ skipping 203 matching lines @@
       'WebKit Win - RandomOrder': 'release_bot_x86_minimal_symbols',
       'Win 10 Fast Ring': 'release_trybot',
       'Windows deterministic': 'release_bot_x86_minimal_symbols',
       'Windows Clang deterministic': 'clang_release_bot_minimal_symbols_x86',
     },
 
     'chromium.goma': {
       'Chromium Linux Goma Staging': 'release_bot',
       'Chromium Mac Goma Staging': 'release_bot',
       'CrWinGomaStaging': 'release_bot_x86_minimal_symbols',
+      'Chromium Linux Goma GCE Staging': 'release_bot',
     },
 
     'chromium.gpu': {
       # These all use the 'trybot' mixins to ensure that dcheck is on.
       'GPU Mac Builder': 'gpu_tests_release_trybot',
       'GPU Mac Builder (dbg)': 'gpu_tests_debug_trybot',
       'GPU Linux Builder (dbg)': 'gpu_tests_debug_trybot',
       'GPU Linux Builder': 'gpu_tests_release_trybot',
       'GPU Win Builder': 'gpu_tests_release_trybot_x86_minimal_symbols',
       'GPU Win Builder (dbg)': 'gpu_tests_debug_trybot_x86_minimal_symbols',
@@ skipping 1677 matching lines @@
 
     'x64': {
       'gn_args': 'target_cpu="x64"',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
     },
   },
 }