[commit: ghc] ghc-8.0: Bump haddock submodule (b594f81)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : ghc-8.0
Link       : http://ghc.haskell.org/trac/ghc/changeset/b594f8191273f4c913bc8413d30fd3061bb577c1/ghc

>---------------------------------------------------------------

commit b594f8191273f4c913bc8413d30fd3061bb577c1
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Wed May 11 23:16:46 2016 +0200

    Bump haddock submodule
    
    Fixes `make clean`.


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b594f8191273f4c913bc8413d30fd3061bb577c1
 utils/haddock | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utils/haddock b/utils/haddock
index 48c63a3..af1a868 160000
--- a/utils/haddock
+++ b/utils/haddock
@@ -1 +1 @@
-Subproject commit 48c63a3a4cd912aedc58b37ea8007c38c55e28ca
+Subproject commit af1a8689da1990da9a152ae8a0e51976f2a27ff6