Use ghc return value instead of looking for the stderr, do not throw error when an haskell module throws a build failure, e.g. because of false positives like this one (debian/arm*) "You are using a new version of LLVM that hasn't been tested yet! We will try though..."

[patterns]
**.h = native
**.c = native
**.cpp = native
**.lua = native
**.txt = native
**.pas = native
**.inc = native
**.hs = native