File _link of Package k3b-factory

<link project="openSUSE:Factory" package="k3b">
  <patches>
    <topadd>%define _with_ffmpeg 1</topadd>
    <topadd>%define _with_mad 1</topadd>
    <topadd>%define _with_lame 1</topadd>
  </patches>
</link>