File _servicedata of Package chirp

<servicedata>
  <service name="tar_scm">
    <param name="url">https://github.com/kk7ds/chirp.git</param>
    <param name="changesrevision">58637366ee4a6b1da7d411b9792ebe7d9e78d8f1</param>
  </service>
</servicedata>