Changes to ghc(4)

Changes to ghc:
commit 6ad11c467d82cb79b242463a6c34205b97a771c2
Author: Austin Seipp <austin@well-typed.com>
Date:   Thu Jun 5 09:13:30 2014 -0500

    Fix .arcconfig

    See, what did I tell you? Broken!

    Signed-off-by: Austin Seipp <austin@well-typed.com>

commit c226d25fef519db663d0c9efe7845637423f1dca
Author: Yuras Shumovich <shumovichy@gmail.com>
Date:   Thu Jun 5 07:56:05 2014 -0500

    Emit error in case of duplicate GRE; fixes #7241

    Signed-off-by: Austin Seipp <austin@well-typed.com>

commit 56ea745c3dd00c87ad86b80f91a31ced5e86e488
Author: Niklas Larsson <niklas@mm.st>
Date:   Sun May 25 11:54:13 2014 +0200

    Add ".text.unlikely" to recognized code sections on Windows.

    Fixes #9080

    Signed-off-by: Austin Seipp <austin@well-typed.com>

commit 3faf83e4884203f34ad10a725dd6d13d7f4ec1de
Author: Austin Seipp <austin@well-typed.com>
Date:   Thu Jun 5 07:31:39 2014 -0500

    Add .arcconfig file. Do not use yet.

    Don't use this yet - it's an experiment, a disaster, whatever. Caveat
    emptor. I'll probably delete everything. Do not taunt Happy Fun Ball -
    you have been warned.

    Signed-off-by: Austin Seipp <austin@well-typed.com>