[Fedora-packaging] python listed explicitly as exception and added to buildsys-build groups

[Bill Nottingham]

Jesse Keating (jkeating at redhat.com) said: 
> I think all the current python module packages don't BuildRequire python.  Nor 
> requires either, since that's automatically done by rpm now (provided python 
> is in the buildroot)

Not all of them, and I think it's wrong to think they shouldn't. At
least the ones I've packaged BR python & python-devel.

Bill