update to 2012.2.0.0 and subpackage whole of Haskell Platform from this package
    
    - update to 2012.2.0.0
    - build the whole of haskell-platform now from this package
      and subpackage like ghc's libraries
    - add alex fix-bang-pattern.diff patch from Debian to fix build on ppc archs
      - requires BR alex
    - drop common_summary and common_description for subpackaging
    - no longer need to unset debug_package
    - make sure all the dynamically linked files get stripped
    - needs ghc-rpm-macros 0.94 or later to build