File _service of Package libvpx

<services>
  <service name="tar_scm" mode="disabled">
    <param name="versionformat">1.6.0~pre%ad</param>
    <param name="url">https://chromium.googlesource.com/webm/libvpx</param>
    <param name="scm">git</param>
  </service>
  <service name="recompress" mode="disabled">
    <param name="compression">xz</param>
    <param name="file">*.tar</param>
  </service>
  <service name="set_version" mode="disabled"/>
</services>