Changes to ghc

Changes to ghc:
commit ab8bb4893be1896303f30d0f1adff8ea9c2470f6
Author: Simon Marlow <marlowsd@gmail.com>
Date:   Mon Apr 28 16:36:29 2014 +0100

    Fix scavenge_stack crash (#9045)

    The new stg_gc_prim_p_ll stack frame was missing an info table.  This
    is a regression since 7.6, because this stuff was part of a cleanup
    that happened in 7.7.