implement rpm ghc-pkg hash metadata for precise automatic library dependency tracking
    
    - add buildroot/ghcpkgbasedir to ghc-deps.sh args
    - calculate package and metadata by checking all library files in stdin
    - prof depends on devel, devel on base
    - update macros.ghc:
      -  rename ghc_requires to ghc_devel_requires
      - drop ghc_doc_requires
      - ghc_reindex_haddock is deprecated and now a no-op