keepCAFsForGHCi was broken
keepCAFsForGHCi was broken

Buggy Makefile code meant it was always included, instead of being
included only for the dyn ways.

Test Plan: validate

Reviewers: hvr, austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D1400

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