Merge "Ignore cleanup errors."

      if os.path.isfile(path):

        os.remove(path)

      elif os.path.isdir(path):

        shutil.rmtree(path)

        shutil.rmtree(path, ignore_errors=True)

    # TODO(xunchang) the signing process can be improved by using

    # '--unsigned_payload_only'. But we need to parse the vbmeta earlier for