- ghc-6.12.1 is part of haskell-platform-2010.1.0.0
    - drop old ghc682, ghc681, haddock09 obsoletes
    - drop haddock_version and no longer provide haddock explicitly
    - add obsoletes for ghc-utf8-string (#571478, reported by Jochen Schmitt)
    - update ghc-rpm-macros BR to 0.5.6 for ghc_pkg_recache