Changes to ghc

Changes to ghc:
commit 24669fe3c033da8dafb2d547cc9f866b7b29d592
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Wed Jan 29 17:00:08 2014 +0100

    Update Win32 submodule to pull in version bump

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>