Changes to ghc

Changes to ghc:
commit 4539400a72ded7fa69149b28cfa9c84464f4739d
Author: Austin Seipp <austin@well-typed.com>
Date:   Tue Apr 29 08:48:57 2014 -0500

    rts: Add an initial Coverity model

    Signed-off-by: Austin Seipp <austin@well-typed.com>