[commit: ghc] master: Update `directory` submodule to v1.2.6.2 release (8556f56)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/8556f56b71f979f70f503e1d23a822b21947f7ab/ghc

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

commit 8556f56b71f979f70f503e1d23a822b21947f7ab
Author: Herbert Valerio Riedel <hvr at gnu.org>
Date:   Tue Apr 19 09:00:54 2016 +0200

    Update `directory` submodule to v1.2.6.2 release
    
    The v1.2.6.1 release uploaded to Hackage is broken, we don't
    want to bundle a release that's non-installable from Hackage


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8556f56b71f979f70f503e1d23a822b21947f7ab
 libraries/directory | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/directory b/libraries/directory
index 8bb9760..ad2e0a1 160000
--- a/libraries/directory
+++ b/libraries/directory
@@ -1 +1 @@
-Subproject commit 8bb9760d3c260ac7a4b5b85092adcecc5709b865
+Subproject commit ad2e0a110bf2ee2e2a3bd87963fa55505ca58b28