[commit: ghc] ghc-8.0: Update unix submodule to latest snapshot (5553041)

[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/5553041115481d8ae70a95d5062907732221a1f9/ghc

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commit 5553041115481d8ae70a95d5062907732221a1f9
Author: Herbert Valerio Riedel <hvr at gnu.org>
Date:   Mon Feb 1 19:38:46 2016 +0100

    Update unix submodule to latest snapshot
    
    Besides containing more internal refactorings,
    this update also bumps unix's version number to 2.7.2.0
    
    (cherry picked from commit ddd38e7dce5d841b89479a4496b117553f0feeec)


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5553041115481d8ae70a95d5062907732221a1f9
 libraries/unix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/unix b/libraries/unix
index 4f3b5d8..ff1c16d 160000
--- a/libraries/unix
+++ b/libraries/unix
@@ -1 +1 @@
-Subproject commit 4f3b5d8b87eef07d8df62a8d7240830bb81a8a6b
+Subproject commit ff1c16d4ee0c4ca043bd99a5d6741ea2d53e7000