RFC: Minor specfile rework for rawhide

[Adam Jackson]

http://people.freedesktop.org/~ajax/kernel-autopatch.patch

Based on something I did for the xserver specfile.  Essentially this
makes it so you only have to name the patches once, in the order you
want to apply them, which makes it both easier to work with and harder
to forget things.

I've tried to make this as friendly and robust as possible, including
bailing out appropriately when faced with a bad patch, and explicitly
naming patches that fail to apply right at the end of build output.
Feedback would be appreciated, even if it's of the form "no, that's
gross."

- ajax