File _service of Package stb

<services>
  <service name="obs_scm" mode="manual">
    <param name="url">https://github.com/nothings/stb.git</param>
    <param name="scm">git</param>
<!-- every header has an own version meanwhile. so using last commit time. -->
    <param name="version">20230129</param>
  </service>
  <service mode="manual" name="set_version" />

  <service mode="buildtime" name="tar" />
  <service mode="buildtime" name="recompress">
    <param name="file">*.tar</param>
    <param name="compression">xz</param>
  </service>
</services>