Changes to ghc(2)

Changes to ghc:
commit 74b6b04f64ed2489ec101407796e69c073fcf704
Author: Edward Z. Yang <ezyang@cs.stanford.edu>
Date:   Mon Jul 7 14:58:29 2014 +0100

    Track gitignore update in submodule unix

    Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

commit 1d225d1ec56624eb235fcc9d27e0d31ae30ed399
Author: Edward Z. Yang <ezyang@cs.stanford.edu>
Date:   Mon Jul 7 14:54:13 2014 +0100

    Private axiom comment in Backpack

    Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
Changes to ghc

Changes to ghc:
commit ff7aaf508be46fc0b873faa0d3002203130f7737
Author: Edward Z. Yang <ezyang@cs.stanford.edu>
Date:   Mon Jul 7 15:14:12 2014 +0100

    More testsuite ignores.

    Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>