Changes to ghc

Changes to ghc:
commit b6352c9912536929537dcebac9d02d4f995c1657
Author: Edward Z. Yang <ezyang@cs.stanford.edu>
Date:   Sun Jun 22 08:42:56 2014 -0700

    Simplify package dump for -v4

    Summary:
    Previously, on -v4  and greater, we dumped out the entire package
    database, including lots of metadata that GHC doesn't really care about,
    and is guaranteed to correspond to the equivalent in the local/global
    package databases on disk.  So, to make this output more useful, on -v4
    we instead just print package IDs, and the exposed and trusted flags
    (E and T, which can be tweaked at runtime).

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

    Test Plan: successful validate

    Reviewers: simonpj

    Subscribers: simonmar, relrod

    Differential Revision: https://phabricator.haskell.org/D24