Changes to ghc

Changes to ghc:
commit 0620241a0f09d1ff865fa575eadb61aa59d2fe4f
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Sun Oct 27 09:59:48 2013 +0100

    Add `{-# LANGUAGE MagicHash #-}` in output of `genprimopcode`

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