RPM Packaging: All debug kernels are bad

RPM Packaging: All debug kernels are bad

We can't build against any of the recent Fedora debug kernels, because
they have options enabled that make criticial symbols GPL-only. Just
skip all debug kernel variants, rather than having to explicitly list
each new Fedora release as it comes out.

Change-Id: I8ed4c04b10facc79fd5a68888ddb10b368b49bef
Reviewed-on: http://gerrit.openafs.org/2263
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>