Update to the newest gnulib.

diff --git a/gnulib b/gnulib
index 112ba3d0677b4c717c893a5744d07b4ea69c36ce..3766806904396257b098d800c04c996306ff9517 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 112ba3d0677b4c717c893a5744d07b4ea69c36ce
+Subproject commit 3766806904396257b098d800c04c996306ff9517