File _servicedata of Package chirp

<servicedata>
  <service name="tar_scm">
    <param name="url">https://github.com/kk7ds/chirp.git</param>
    <param name="changesrevision">c61c1e464d7f7cbc74beb118e27b10d40a2aa9e0</param>
  </service>
</servicedata>