fix message for missing packages
fix message for missing packages

An incorrect libraries/ prefix was being added.

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