Update to newest gnulib.

diff --git a/gnulib b/gnulib
index 7b1de4a62f8766787160f785217671b074e0f0f2..5cdec0ff5ecf34474d90d8b57f50a148449cda0c 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 7b1de4a62f8766787160f785217671b074e0f0f2
+Subproject commit 5cdec0ff5ecf34474d90d8b57f50a148449cda0c