File _servicedata of Package superbitcoin

<servicedata>
  <service name="tar_scm">
    <param name="url">https://github.com/superbitcoin/superbitcoin.git</param>
    <param name="changesrevision">90b776e1b2eb2258e782259a649b2c33653f9586</param>
  </service>
</servicedata>