[Rpm-maint] sparc fixes

[Jeremy Katz]

On Thursday, April 02 2009, Tom spot Callaway said:
> When we updated the Fedora SPARC buildsystems to rpm 4.6.0, sparcv9v
> packages were no longer installable. The attached patch resolves the
> issue. Unfortunately, the sanest way to correctly determine the cpu type
> on SPARCs is to parse /proc/cpuinfo.
> 
> Thankfully, we only really care in the sparcv9v/sparc64v (Niagara) case.

The problem with this is that there are plenty of cases where /proc
isn't mounted when you're working with chroots

Jeremy