File _service of Package servo

<?xml version="1.0"?>
<services>
  <service name="tar_scm" mode="manual">
    <param name="url">https://github.com/servo/servo.git</param>
    <param name="scm">git</param>
    <param name="versionformat">v0.0.1+%cd_%h</param>
    <param name="revision">main</param>
  </service>
  <service name="recompress" mode="disabled">
    <param name="file">servo-*.tar</param>
    <param name="compression">gz</param>
  </service>
  <service name="cargo_vendor" mode="manual">
   <param name="compression">gz</param>
   <param name="srcdir">servo</param>
   <param name="update">false</param>
  </service>
</services>