Add note about superclass cycle check
Add note about superclass cycle check

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