Changes to integer-gmp(2)

Changes to integer-gmp:
commit 66ea120f3a31ba8d81556fa121f9b998eef570b8
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Fri Jan 3 22:58:32 2014 +0100

    Refactor `stgReallocForGMP` to use `memcpy`

    GCC is able to generate better code when using `memcpy` instead of
    manually copying bytes in a loop. Otoh, `stgAllocForGMP` is typically
    called for enlarging initial single-limb structures (see also #8647 for
    more information) and so this minor optimization won't be very visible
    in measurements.

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

commit c6f046a32a51898cc4ce96b3d4954b2133acd75a
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Fri Jan 3 22:42:33 2014 +0100

    Make use of `quotRemInt#` primop in `quotRemInteger`

    Otoh, `divModInt#` is not a proper primop (it's implemented as wrapper
    around `quotRemInt#` in `GHC.Base`), so we can't do the same for
    `divModInteger` yet.

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