Update to newest gnulib.

diff --git a/gnulib b/gnulib
index c9c4db5dd2e327d58b6ee1734037904123caa0e3..160d5e7d9a64a29a52d4821fd0ef2136d7e2102a 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit c9c4db5dd2e327d58b6ee1734037904123caa0e3
+Subproject commit 160d5e7d9a64a29a52d4821fd0ef2136d7e2102a