File _link of Package cups-backends

<link project="openSUSE:Factory" package="cups-backends">
  <patches>
    <delete name="cups-backends-silenct-hal.patch" />
    <delete name="hal.c" />
    <delete name="hpnpf.patch" />
    <delete name="hpnpf.tgz" />
    <delete name="hpnpf.txt" />
    <apply name="project.diff" />
  </patches>
</link>