[commit: ghc] ghc-8.2: Bump haddock submodule (8c7ec7e)

[git at git.haskell.org]

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

On branch  : ghc-8.2
Link       : http://ghc.haskell.org/trac/ghc/changeset/8c7ec7ea7233a771a4e761bbbbe5c250c6c5ab32/ghc

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

commit 8c7ec7ea7233a771a4e761bbbbe5c250c6c5ab32
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Fri Jun 30 09:22:21 2017 -0400

    Bump haddock submodule
    
    Fixes a rather bad regression between 2.16 and 2.17 where it didn't show
    per argument documentation on class methods


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8c7ec7ea7233a771a4e761bbbbe5c250c6c5ab32
 utils/haddock | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utils/haddock b/utils/haddock
index d5d8cd1..af3e6c7 160000
--- a/utils/haddock
+++ b/utils/haddock
@@ -1 +1 @@
-Subproject commit d5d8cd1722b06f17155e830f2242a073b0a983eb
+Subproject commit af3e6c7c027389df18b15ee9a9d72ffc97dc1852