add note about compilation safety to safe haskell docs
add note about compilation safety to safe haskell docs

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