message: Fixed repo.py to not send git errors to stderr.
  Some repos are not git repos, so git is expected
  to fail.  These errors should not go to stderr,
  because Xcode interprets them as failures.
diff: @@ -11,7 +11,7 @@ def identifier():
  except:
  pass
  try:
  - git_remote_and_branch = subprocess.check_output(["git", "rev-parse", "--abbrev-ref", "--symbolic-full-name", "@{u}"]).rstrip()
  + git_remote_and_branch = subprocess.check_output(["git", "rev-parse", "--abbrev-ref", "--symbolic-full-name", "@{u}"], stderr=subprocess.STDOUT).rstrip()
  git_remote = git_remote_and_branch.split("/")[0]
  git_branch = "/".join(git_remote_and_branch.split("/")[1:])
  git_url = subprocess.check_output(["git", "remote", "get-url", git_remote]).rstrip()
  