Update logdog butler revision on GPU.FYI bots

content/test/gpu/generate_buildbot_json.py

 #!/usr/bin/env python
 # Copyright 2016 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.
 
 """Script to generate chromium.gpu.json and chromium.gpu.fyi.json in
 the src/testing/buildbot directory. Maintaining these files by hand is
 too unwieldy.
 """
 
@@ skipping 2112 matching lines @@
       if 'test' in result:
         result['override_isolate_target'] = result['test']
       else:
         result['override_isolate_target'] = result['name']
       # Integrate with the unified logcat system.
       result['swarming'].update({
         'cipd_packages': [
           {
             'cipd_package': 'infra/tools/luci/logdog/butler/${platform}',
             'location': 'bin',
-            'revision': 'git_revision:25755a2c316937ee44a6432163dc5e2f9c85cf58'
+            'revision': 'git_revision:ff387eadf445b24c935f1cf7d6ddd279f8a6b04c'
           }
         ],
         'output_links': [
           {
             'link': [
               'https://luci-logdog.appspot.com/v/?s',
               '=android%2Fswarming%2Flogcats%2F',
               '${TASK_ID}%2F%2B%2Funified_logcats'
             ],
             'name': 'shard #${SHARD_INDEX} logcats'
@@ skipping 174 matching lines @@
   install_parent_links(WATERFALL)
   install_parent_links(V8_FYI_WATERFALL)
 
   generate_all_tests(FYI_WATERFALL, 'chromium.gpu.fyi.json')
   generate_all_tests(WATERFALL, 'chromium.gpu.json')
   generate_all_tests(V8_FYI_WATERFALL, 'client.v8.fyi.json')
   return 0
 
 if __name__ == "__main__":
   sys.exit(main())