Replace freeVarsOf scrut with scrut_fvs to avoid repetition
Replace freeVarsOf scrut with scrut_fvs to avoid repetition

Test Plan: harbormaster

Reviewers: bgamari, simonmar, austin

Reviewed By: austin

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D1439

GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,mcschroeder/ghc,snoyberg/ghc,snoyberg/ghc,sdiehl/ghc,nushio3/ghc,tjakway/ghcjvm,snoyberg/ghc,sgillespie/ghc,mcschroeder/ghc,shlevy/ghc,vTurbine/ghc,ezyang/ghc,nushio3/ghc,oldmanmike/ghc,tjakway/ghcjvm,vTurbine/ghc,vikraman/ghc,sdiehl/ghc,mcschroeder/ghc,shlevy/ghc,sgillespie/ghc,oldmanmike/ghc,sgillespie/ghc,shlevy/ghc,vTurbine/ghc,mettekou/ghc,sgillespie/ghc,elieux/ghc,tjakway/ghcjvm,da-x/ghc,gridaphobe/ghc,sgillespie/ghc,oldmanmike/ghc,snoyberg/ghc,vikraman/ghc,tjakway/ghcjvm,tjakway/ghcjvm,elieux/ghc,da-x/ghc,ezyang/ghc,oldmanmike/ghc,da-x/ghc,snoyberg/ghc,olsner/ghc,mcschroeder/ghc,vTurbine/ghc,sdiehl/ghc,elieux/ghc,sdiehl/ghc,mettekou/ghc,elieux/ghc,ezyang/ghc,olsner/ghc,elieux/ghc,vTurbine/ghc,shlevy/ghc,oldmanmike/ghc,da-x/ghc,snoyberg/ghc,ezyang/ghc,GaloisInc/halvm-ghc,vTurbine/ghc,tjakway/ghcjvm,shlevy/ghc,nushio3/ghc,olsner/ghc,olsner/ghc,oldmanmike/ghc,snoyberg/ghc,shlevy/ghc,da-x/ghc,nushio3/ghc,vikraman/ghc,nushio3/ghc,sdiehl/ghc,da-x/ghc,oldmanmike/ghc,GaloisInc/halvm-ghc,sgillespie/ghc,vikraman/ghc,mcschroeder/ghc,GaloisInc/halvm-ghc,mettekou/ghc,mettekou/ghc,mettekou/ghc,sgillespie/ghc,ezyang/ghc,sdiehl/ghc,mettekou/ghc,olsner/ghc,nushio3/ghc,gridaphobe/ghc,da-x/ghc,GaloisInc/halvm-ghc,gridaphobe/ghc,vTurbine/ghc,vikraman/ghc,shlevy/ghc,ezyang/ghc,elieux/ghc,ezyang/ghc,mcschroeder/ghc,olsner/ghc,gridaphobe/ghc,vikraman/ghc,tjakway/ghcjvm,vikraman/ghc,elieux/ghc,gridaphobe/ghc,GaloisInc/halvm-ghc,mcschroeder/ghc,gridaphobe/ghc,gridaphobe/ghc,mettekou/ghc,sdiehl/ghc,nushio3/ghc,olsner/ghc