Switch off -split-objs by default, fix #153.
Switch off -split-objs by default, fix #153.

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