Fix missing import in HscMain.
Fix missing import in HscMain.

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