[commit: ghc] ghc-8.4: Bump haddock submodule again (6d7eecf)

[git at git.haskell.org]

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

On branch  : ghc-8.4
Link       : http://ghc.haskell.org/trac/ghc/changeset/6d7eecff7948ad77854f834f55b4d4f942276ad3/ghc

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

commit 6d7eecff7948ad77854f834f55b4d4f942276ad3
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Thu Mar 29 13:59:00 2018 -0400

    Bump haddock submodule again


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

6d7eecff7948ad77854f834f55b4d4f942276ad3
 utils/haddock | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utils/haddock b/utils/haddock
index 7064cd5..37e9341 160000
--- a/utils/haddock
+++ b/utils/haddock
@@ -1 +1 @@
-Subproject commit 7064cd54e016b2f8e0a8c2ba8d3dd5edea9071ca
+Subproject commit 37e93411ef8ee673eebd6c56b8db3f2e851572c9