revert removal of ghcconfig.h from package.conf.in
revert removal of ghcconfig.h from package.conf.in

as it's preprocessed with -undef (pointed out by Esa Ilari Vuokko)

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