F20 System Wide Change: ARM as primary Architecture

[DJ Delorie]

> i will look at throwing together a script to give us some comparisons
> between the build times on the different arches.

> I've already done this, last time it came up...
> http://www.delorie.com/arm/koji-compare-build-times.tar.gz

Also, I'm running the script now, I'll post results when it finishes,
let's not ALL hit the koji database at the same time ;-)