File _servicedata of Package google-guest-agent

<servicedata>
<service name="tar_scm">
                <param name="url">https://github.com/GoogleCloudPlatform/guest-agent/</param>
              <param name="changesrevision">9891a87a3de7d0969c7845cc56d77bdf4f0bbbea</param></service></servicedata>