[rpmfusion-packager/f25] Use koji-rpmfusion name instead rpmfusion-koji, also koji-rpmfusion is symlink

[Sérgio M. Basto]

Summary of changes:

  4fa6579... Use koji-rpmfusion name instead rpmfusion-koji, also koji-r (*)

(*) This commit already existed in another branch; no separate mail sent