message: Fix typo in auto-updater.
  No-Try: True
  No-Presubmit: True
  Cr-Commit-Position: refs/heads/master@{#32832}
diff: @@ -104,7 +104,7 @@ def _LocalCommit():
  tbr_authors = git_author + ',' + 'mbonadei@webrtc.org'
  tbr = 'TBR=%s' % tbr_authors
  commit_msg = ('Update WebRTC code version (%02d-%02d-%02dT%02d:%02d:%02d).'
  - '\n\nTBR=%s\nBugs: None')
  + '\n\nTBR=%s\nBug: None')
  commit_msg = commit_msg % (d.year, d.month, d.day, d.hour, d.minute,
  d.second, tbr_authors)
  subprocess.check_call(['git', 'add', '--update', '.'])
  