Changes to ghc testsuite

Changes to ghc:
commit 95ba5d81efcf817768d65552843c7f6c4d63e340
Author: Joachim Breitner <mail@joachim-breitner.de>
Date:   Wed Dec 4 08:42:13 2013 +0000

    More detailed error message when GND fails

    we now print the precise class method, with types, where the coercion
    failed.

Changes to testsuite:
commit 20d7273788c9d0bc0aa002830f0c0717560a9ce4
Author: Joachim Breitner <mail@joachim-breitner.de>
Date:   Wed Dec 4 09:02:50 2013 +0000

    Update output: More elaborate GND error messages