rts/Linker(ARM): Ensure all code sections are flushed from cache
rts/Linker(ARM): Ensure all code sections are flushed from cache

Test Plan: Validate with T12299

Reviewers: hsyl20, austin, erikd

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D1708

GHC Trac Issues: #11299

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