[redhat-rpm-config/f15] (3 commits) ...revert back to ghc_arches at releng's request

[Jens Petersen]

Summary of changes:

  60590c6... Revert "rename the arch patch in .spec too" (*)
  62baae7... Revert "replace ghc_archs with ghc_excluded_archs" (*)
  8e0316b... revert back to ghc_arches at releng's request (*)

(*) This commit already existed in another branch; no separate mail sent