Changes to ghc

Changes to ghc:
commit ed86b1a3140ee6a275a6047fc53f509a4b1ab30e
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Mon Jan 13 16:42:58 2014 +0100

    Remove obsolete declarations from `MiscClosures.h`

    When `integer-gmp` was moved out of the RTS
    (via 1b61c2db6a8d6627577bcd7876474a0c5bd1eedb)
    these declarations were missed.

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