add $(CrossCompilePrefix) to hp2ps (#7639)
add $(CrossCompilePrefix) to hp2ps (#7639)

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