Ignore repeated loads of the same archive (#8942)
Ignore repeated loads of the same archive (#8942)

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