Changes to ghc

Changes to ghc:
commit 34db5ccf52ec2a1b5e953c282d0c52a7fc82c02a
Author: Joachim Breitner <mail@joachim-breitner.de>
Date:   Wed Apr 30 11:22:32 2014 +0200

    Replace all #!/usr/bin/perl with #!/usr/bin/env perl

    As suggested in #9057.