Changes to ghc

Changes to ghc:
commit 05120ecd95b2ebf9b096a95304793cd78be9506e
Author: Edward Z. Yang <ezyang@cs.stanford.edu>
Date:   Fri Jun 27 13:48:19 2014 +0100

    Make -fno-write-interface to all modes of GHC, not just -fno-code.

    Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>