Attempt to build stage1 GHC.
Attempt to build stage1 GHC.

See #110. [skip ci]

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