Fix rules/build-dependencies.mk on OS X Also more comments on why we have the sed rules that we do.
Fix rules/build-dependencies.mk on OS X
Also more comments on why we have the sed rules that we do.

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