add receipes for goma staging

scripts/slave/bot_update.py

 #!/usr/bin/env python
 # 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.
 
 # TODO(hinoka): Use logging.
 
 import cStringIO
 import codecs
 import collections
@@ skipping 245 matching lines @@
     'client.nacl.ports',
     'client.nacl.sdk',
     'client.nacl.toolchain',
     'client.skia',
     'client.skia.fyi',
     'client.v8',
     'client.v8.branches',
     'client.v8.fyi',
     'client.webrtc',
     'client.webrtc.fyi',
+    'goma',
     'tryserver.blink',
     'tryserver.client.catapult',
     'tryserver.client.mojo',
     'tryserver.chromium.angle',
     'tryserver.chromium.linux',
     'tryserver.chromium.mac',
     'tryserver.chromium.perf',
     'tryserver.chromium.win',
     'tryserver.infra',
     'tryserver.nacl',
@@ skipping 1426 matching lines @@
   except Exception:
     # Unexpected failure.
     emit_flag(options.flag_file)
     raise
   else:
     emit_flag(options.flag_file)
 
 
 if __name__ == '__main__':
   sys.exit(main())