Fix way-specific flags
Fix way-specific flags

sdiehl/ghc,snowleopard/hadrian,izgzhen/hadrian,sdiehl/ghc,bgamari/shaking-up-ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,snowleopard/shaking-up-ghc,sdiehl/ghc