substitute for $topdir in $(AR)
substitute for $topdir in $(AR)

Fixes ghcilink001, ghcilink004 on Windows

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