patch applied (ghc): API changes for cabal-HEAD

[Clemens Fruhwirth]

Thu Dec 27 06:31:14 PST 2007  Clemens Fruhwirth <clemens at endorphin.org>
  * API changes for cabal-HEAD
  
  Rename interfacedir to haddockdir
  Change empty(Copy|Register)Flags to default(Copy|Register)Flags
  Wrap content of RegisterFlags with toFlag (the Flag type is actually just Maybe)

    M ./libraries/Makefile -4 +4
    M ./libraries/installPackage.hs -27 +28