[commit: ghc] ghc-8.0: Update unix submodule to 2.7.2.1 (4b8202e)

[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/4b8202ebb5ce1991fea0066f5e3a3f5667435b46/ghc

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

commit 4b8202ebb5ce1991fea0066f5e3a3f5667435b46
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Fri Nov 11 18:20:31 2016 -0500

    Update unix submodule to 2.7.2.1


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

4b8202ebb5ce1991fea0066f5e3a3f5667435b46
 libraries/unix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/unix b/libraries/unix
index 7b20b4c..113fe7a 160000
--- a/libraries/unix
+++ b/libraries/unix
@@ -1 +1 @@
-Subproject commit 7b20b4cbc35a2fea3f26c988f9b2a95640babaaa
+Subproject commit 113fe7a84d47010123db9501ea2885ca86277a2d