File _servicedata of Package read-only-root-fs

<servicedata>
  <service name="tar_scm">
    <param name="url">https://github.com/openSUSE/read-only-root-fs.git</param>
    <param name="changesrevision">9c3e92fbc0961a06d006feb13f15df1874f021e1</param>
  </service>
</servicedata>