File _service of Package retroarch

<services>
  <service name="tar_scm">
    <param name="url">git://github.com/libretro/RetroArch.git</param>
    <param name="scm">git</param>
    <param name="filename">RetroArch</param>
    <param name="versionformat">1.7.9.2</param>
    <param name="revision">v1.7.9.2</param>
  </service>
  <service name="recompress">
    <param name="file">*.tar</param>
    <param name="compression">xz</param>
  </service>
  <service name="set_version"/>
</services>