[cabal-install/f15] (5 commits) ...Merge remote-tracking branch 'origin/f16' into f15

[Jens Petersen]

Summary of changes:

  f394f67... BR ghc-Cabal-devel and use ghc_excluded_archs (*)
  726d87c... also BR random and time (*)
  c70fbfd... ghc_arches replaces ghc_excluded_archs (cabal2spec-0.23.2) (*)
  fd994c1... Reverting last change so f16 branch can be merged
  fb02116... Merge remote-tracking branch 'origin/f16' into f15

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