SpecConstr now specialises on constants and lambdas 
SpecConstr now specialises on constants and lambdas 

Roman inspired me to beef up SpecConstr to deal with
a) constant arguments
b) lambda arguments

This is described in elaborate comments in the file:
 	Note [Specialising for constant parameters]
	Note [Specialising for lambda parameters]

I also took the opportunity to fix the usage analysis done by
SpecConstr, which was only handling the top-level correctly.
Now it does nesting too.



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