Changes to ghc

Changes to ghc:
commit a90da927b4c84d03608efbdaeb3c78750a700ec4
Author: Joachim Breitner <mail@joachim-breitner.de>
Date:   Thu Feb 13 09:22:07 2014 +0000

    Link to #minimal-pragma from release notes

    (cherry picked from commit 9f607eeb6227635a219b316926891e825557682c)
    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>