[fedora-arm] armv7hl requirements

[omalleys at msu.edu]

Quoting DJ Delorie <dj at redhat.com>:

> For a kernel RPM build, for example, distcc reduces my build time from
> 100 minutes to 60 minutes, a 40% improvement.

It took me about 50-60 minutes to compile the kernel on the guruplug,  
on a mounted NFS filesystem (hosted on x85 linux) with syncing(?),  
security, etc. turned off shared over GigE.

(that was a straight kernel compile, not an rpm.)