File _service of Package imagewriter

<services>
  <service name="tar_scm">
    <param name="url">git://github.com/openSUSE/imagewriter.git</param>
    <param name="versionprefix">1.10</param>
    <param name="versionformat">%ct.%h</param>
    <param name="scm">git</param>
    <param name="revision">master</param>
    <param name="changesgenerate">enable</param>
  </service>
  <service name="recompress">
    <param name="compression">xz</param>
    <param name="file">*.tar</param>
  </service>
  <service name="set_version"/>
</services>