File _service of Package build-unstable

<services>

  <service name="obs_scm">
    <param name="versionformat">%ad</param>
    <param name="url">https://github.com/openSUSE/obs-build.git</param>
    <param name="scm">git</param>
    <param name="extract">dist/build.changes</param>
    <param name="extract">dist/build.spec</param>
    <param name="extract">dist/build.dsc</param>
    <param name="extract">dist/debian.changelog</param>
    <param name="extract">dist/debian.compat</param>
    <param name="extract">dist/debian.control</param>
    <param name="extract">dist/debian.rules</param>
    <param name="extract">dist/PKGBUILD</param>
    <param name="latest-signed-commit">true</param>
    <param name="maintainers-asc">_maintainers.asc</param>
  </service>
  <service name="tar" mode="buildtime"/>
  <service name="recompress" mode="buildtime">
    <param name="compression">gz</param>
    <param name="file">*.tar</param>
  </service>
  <service name="set_version" mode="buildtime"/>
</services>