Fix binary-dist target with xz/gzip
Fix binary-dist target with xz/gzip

This was harmless but annoying: we forgot to take the compression
extention into account when copying the binary dist out of bindistprep

Signed-off-by: Austin Seipp <7ea35d812706d9213868749011af1ed4fa2f6aa0@well-typed.com>

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