[fedora-arm] armv7hl requirements

[DJ Delorie]

> We dont allow the use of any cross compiliation for any fedora bits.
> one of the requirements is full native compiliation.

Yup, I understand that.  I'm riding the philosophical fine line
between "actual full native" and "indistinguishable from full native",
but agree that the official distibutions should involve no cross
compilers.  My hack allows individuals to choose which side of the
line they want to be on, but doesn't require any changes that *break*
full native.

My goal (our goal?) is to get a miniminal set of RPMs in the shortest
time, since that milestone enables so many more people to get stuff
done.  It's a blocker for massive parallelization.  And we can always
rebuild the "tainted" RPMs later.