Backport latest ghc from devel:
    Sat May 2 2009 Jens Petersen <petersen@redhat.com> - 6.10.2-5
    - try unregisterised ppc to see if that stops the segfaulting with runghc
    Tue Apr 28 2009 Jens Petersen <petersen@redhat.com> - 6.10.2-4
    - add experimental bcond hscolour
    - add experimental support for building shared libraries (for ghc-6.11)
    - add libs subpackage for shared libraries
    - create a ld.conf.d file for libghc*.so
    - BR libffi-devel
    - drop redundant setting of GhcLibWays in build.mk for no prof
    - drop redundant setting of HADDOCK_DOCS
    - simplify filelist names
    - add a check section based on tests from debian's package
    - be more careful about doc files in filelist
    Fri Apr 24 2009 Jens Petersen <petersen@redhat.com> - 6.10.2-3
    - define ghc_version in macros.ghc
    Sun Apr 19 2009 Jens Petersen <petersen@redhat.com> - 6.10.2-2
    - update macros.ghc:
    - pkg_libdir and pkg_docdir obsoleted in packages and replaced by ghcpkgdir
        and ghcdocdir inside macros.ghc
    - make filelist also for docs