Implement ctors support for Linux.
Implement ctors support for Linux.

Signed-off-by: Edward Z. Yang <dbd597f5635f432486c5d365e9bb585b3eaa1853@mit.edu>

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