Changes to ghc

Changes to ghc:
commit 0346dee9231db0b3e7662a1f738ec688669b4c04
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Tue Nov 19 22:34:14 2013 +0100

    Update `primitive` to upstream's current HEAD

    This includes a fix to silence a GCC warning which causes validate failures
    on OSX (see haskell/primitive#4 for more details)