8b84ee0 add bcond for system libffi and fix system libffi build

Authored and Committed by petersen 13 years ago
    add bcond for system libffi and fix system libffi build
    
    - rename ghc-use-system-libffi-debian.patch to ghc-use-system-libffi.patch.
    - add ffi to SRC_HC_OPTS
    - use pkgconfig-depends in compiler/ghc.cabal for libffi
    
        
ghc-use-system-libffi.patch ghc-use-system-libffi-debian.patch
file renamed
file modified
+13 -3