[commit: ghc] ghc-8.2: Bump unix submodule (6c3e744)

[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/6c3e7442a3c48601e29f39e83cb162fc1756374d/ghc

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

commit 6c3e7442a3c48601e29f39e83cb162fc1756374d
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Fri Apr 21 13:11:07 2017 -0400

    Bump unix submodule


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

6c3e7442a3c48601e29f39e83cb162fc1756374d
 libraries/unix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/unix b/libraries/unix
index 821cb07..19aaa0f 160000
--- a/libraries/unix
+++ b/libraries/unix
@@ -1 +1 @@
-Subproject commit 821cb07ecf235625b4bb06626d30e4b15f28df30
+Subproject commit 19aaa0fcca3427e4006a967972eb16a570ca43b1