Fix the libffi ln handling on cygwin
Fix the libffi ln handling on cygwin

iWe were adding c:/... to $PATH, but : is the separator
in $PATH.

hferreiro/replay,urbanslug/ghc,nomeata/ghc,vTurbine/ghc,tibbe/ghc,nathyong/microghc-ghc,siddhanathan/ghc,AlexanderPankiv/ghc,GaloisInc/halvm-ghc,sdiehl/ghc,TomMD/ghc,tibbe/ghc,TomMD/ghc,ml9951/ghc,wxwxwwxxx/ghc,jstolarek/ghc,anton-dessiatov/ghc,elieux/ghc,oldmanmike/ghc,da-x/ghc,gridaphobe/ghc,gcampax/ghc,gridaphobe/ghc,mettekou/ghc,snoyberg/ghc,vikraman/ghc,forked-upstream-packages-for-ghcjs/ghc,tjakway/ghcjvm,ezyang/ghc,GaloisInc/halvm-ghc,nomeata/ghc,snoyberg/ghc,frantisekfarka/ghc-dsi,mettekou/ghc,holzensp/ghc,nkaretnikov/ghc,vTurbine/ghc,gcampax/ghc,ml9951/ghc,sdiehl/ghc,siddhanathan/ghc,da-x/ghc,mcmaniac/ghc,ilyasergey/GHC-XAppFix,GaloisInc/halvm-ghc,olsner/ghc,olsner/ghc,shlevy/ghc,fmthoma/ghc,mcmaniac/ghc,ml9951/ghc,gridaphobe/ghc,elieux/ghc,anton-dessiatov/ghc,ezyang/ghc,tibbe/ghc,da-x/ghc,gcampax/ghc,mettekou/ghc,lukexi/ghc-7.8-arm64,anton-dessiatov/ghc,mfine/ghc,christiaanb/ghc,bitemyapp/ghc,tjakway/ghcjvm,tjakway/ghcjvm,da-x/ghc,siddhanathan/ghc,acowley/ghc,oldmanmike/ghc,ezyang/ghc,sgillespie/ghc,acowley/ghc,fmthoma/ghc,ghc-android/ghc,vikraman/ghc,TomMD/ghc,urbanslug/ghc,nushio3/ghc,GaloisInc/halvm-ghc,gcampax/ghc,fmthoma/ghc,anton-dessiatov/ghc,nushio3/ghc,hferreiro/replay,nathyong/microghc-ghc,ghc-android/ghc,lukexi/ghc,spacekitteh/smcghc,vikraman/ghc,christiaanb/ghc,tibbe/ghc,ilyasergey/GHC-XAppFix,green-haskell/ghc,jstolarek/ghc,GaloisInc/halvm-ghc,vikraman/ghc,christiaanb/ghc,GaloisInc/halvm-ghc,mfine/ghc,nushio3/ghc,sgillespie/ghc,mfine/ghc,mcschroeder/ghc,wxwxwwxxx/ghc,green-haskell/ghc,tibbe/ghc,forked-upstream-packages-for-ghcjs/ghc,ryantm/ghc,gridaphobe/ghc,ghc-android/ghc,fmthoma/ghc,sgillespie/ghc,snoyberg/ghc,mcmaniac/ghc,wxwxwwxxx/ghc,urbanslug/ghc,wxwxwwxxx/ghc,bitemyapp/ghc,mettekou/ghc,TomMD/ghc,elieux/ghc,nathyong/microghc-ghc,lukexi/ghc-7.8-arm64,olsner/ghc,urbanslug/ghc,shlevy/ghc,nathyong/microghc-ghc,tjakway/ghcjvm,lukexi/ghc,vikraman/ghc,urbanslug/ghc,forked-upstream-packages-for-ghcjs/ghc,elieux/ghc,shlevy/ghc,snoyberg/ghc,ekmett/ghc,mcschroeder/ghc,christiaanb/ghc,shlevy/ghc,AlexanderPankiv/ghc,lukexi/ghc-7.8-arm64,mettekou/ghc,acowley/ghc,hferreiro/replay,fmthoma/ghc,mcschroeder/ghc,oldmanmike/ghc,nkaretnikov/ghc,frantisekfarka/ghc-dsi,da-x/ghc,holzensp/ghc,mcschroeder/ghc,vTurbine/ghc,olsner/ghc,nkaretnikov/ghc,spacekitteh/smcghc,ekmett/ghc,nomeata/ghc,acowley/ghc,lukexi/ghc,sdiehl/ghc,ryantm/ghc,ekmett/ghc,green-haskell/ghc,sdiehl/ghc,bitemyapp/ghc,ghc-android/ghc,gridaphobe/ghc,jstolarek/ghc,sdiehl/ghc,oldmanmike/ghc,tjakway/ghcjvm,siddhanathan/ghc,vikraman/ghc,acowley/ghc,ilyasergey/GHC-XAppFix,hferreiro/replay,ilyasergey/GHC-XAppFix,lukexi/ghc,nushio3/ghc,frantisekfarka/ghc-dsi,jstolarek/ghc,acowley/ghc,holzensp/ghc,ml9951/ghc,bitemyapp/ghc,christiaanb/ghc,olsner/ghc,TomMD/ghc,spacekitteh/smcghc,mcschroeder/ghc,hferreiro/replay,nathyong/microghc-ghc,lukexi/ghc-7.8-arm64,gcampax/ghc,AlexanderPankiv/ghc,elieux/ghc,mfine/ghc,mfine/ghc,ezyang/ghc,nkaretnikov/ghc,siddhanathan/ghc,sdiehl/ghc,sgillespie/ghc,mfine/ghc,acowley/ghc,oldmanmike/ghc,gridaphobe/ghc,vTurbine/ghc,nushio3/ghc,da-x/ghc,shlevy/ghc,tjakway/ghcjvm,mettekou/ghc,snoyberg/ghc,GaloisInc/halvm-ghc,anton-dessiatov/ghc,spacekitteh/smcghc,lukexi/ghc-7.8-arm64,gridaphobe/ghc,ryantm/ghc,frantisekfarka/ghc-dsi,lukexi/ghc,nathyong/microghc-ghc,fmthoma/ghc,wxwxwwxxx/ghc,nushio3/ghc,holzensp/ghc,urbanslug/ghc,vTurbine/ghc,ml9951/ghc,da-x/ghc,mcmaniac/ghc,mettekou/ghc,gcampax/ghc,fmthoma/ghc,olsner/ghc,ml9951/ghc,nomeata/ghc,mcmaniac/ghc,christiaanb/ghc,green-haskell/ghc,oldmanmike/ghc,sgillespie/ghc,ekmett/ghc,ezyang/ghc,olsner/ghc,mcschroeder/ghc,siddhanathan/ghc,gcampax/ghc,vTurbine/ghc,ghc-android/ghc,mfine/ghc,forked-upstream-packages-for-ghcjs/ghc,shlevy/ghc,ezyang/ghc,wxwxwwxxx/ghc,jstolarek/ghc,ghc-android/ghc,nkaretnikov/ghc,ml9951/ghc,tjakway/ghcjvm,elieux/ghc,sdiehl/ghc,ml9951/ghc,green-haskell/ghc,vikraman/ghc,urbanslug/ghc,forked-upstream-packages-for-ghcjs/ghc,wxwxwwxxx/ghc,forked-upstream-packages-for-ghcjs/ghc,AlexanderPankiv/ghc,ekmett/ghc,frantisekfarka/ghc-dsi,AlexanderPankiv/ghc,bitemyapp/ghc,holzensp/ghc,sgillespie/ghc,ghc-android/ghc,TomMD/ghc,shlevy/ghc,AlexanderPankiv/ghc,nomeata/ghc,nathyong/microghc-ghc,forked-upstream-packages-for-ghcjs/ghc,TomMD/ghc,elieux/ghc,mcschroeder/ghc,ezyang/ghc,oldmanmike/ghc,vTurbine/ghc,spacekitteh/smcghc,snoyberg/ghc,nkaretnikov/ghc,ryantm/ghc,nkaretnikov/ghc,ryantm/ghc,snoyberg/ghc,siddhanathan/ghc,hferreiro/replay,hferreiro/replay,christiaanb/ghc,AlexanderPankiv/ghc,nushio3/ghc,sgillespie/ghc,anton-dessiatov/ghc,anton-dessiatov/ghc