Switch devel to Fedora F-13 until we branch RPMFusion F-13

[Kevin Kofler]

I wrote:

> But the problem here is not i686 packages being pulled into x86_64 builds,
> but x86_64 packages being pulled into i686 builds!
> 
> I think i686 configs need an exclude=*.x86_64 line.

PS: This is an urgent issue as it's breaking kdenlive builds and the current 
kdenlive in RPM Fusion is broken with Qt 4.6.x which is now stable in F11 
and F12.

        Kevin Kofler