File _service of Package spotify-client

<services>
  <service name="download_url">
    <param name="url">https://repository-origin.spotify.com/pool/non-free/s/spotify-client/spotify-client_1.2.84.476.ga1ff6607_amd64.deb</param>
    <param name="filename">spotify-client.deb</param>
  </service>
</services>