Don't duplicate decls unnecessarily in the environment
Don't duplicate decls unnecessarily in the environment

In loopDecls, as far as I can see the globalDecls will always
already be in the environment, so don't add them again.

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