Changes to ghc

Changes to ghc:
commit fe3740bd931ca30c22d956816f71be9026eeef54
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Sun Jan 19 14:37:05 2014 +0100

    Make `#include "Rts.h"` C++-compatible again (re #8676)

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