Changes to ghc

Changes to ghc:
commit 864759cbf7061849ce93123ebb15a3bb6ae06111
Author: Joachim Breitner <mail@joachim-breitner.de>
Date:   Fri May 23 22:27:58 2014 +0200

    test.mk: Be liberal in accepting GHC_PKG output

    When the tree is not built, GHC_PKG refers to ghc-pkg in the patth,
    which may not yet support --simple-output to suppress the field name. So
    we strip the fieldname when parsing the output, to avoid annoying
    warnings.