File _servicedata of Package mumble

<servicedata>
  <service name="tar_scm">
    <param name="url">https://github.com/mumble-voip/mumble.git</param>
    <param name="changesrevision">f9f2d1b63b15883a470d1abe184342fe509b6dfb</param>
  </service>
</servicedata>