Add ghcautoconf, ghcplatform as rtsConf dependencies
Add ghcautoconf, ghcplatform as rtsConf dependencies

This fixes #76.

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