- add experimental bcond hscolour
    - BR libffi-devel
    - 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
    - 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 package
    - be more careful about doc files in filelist