gnulib: update.

diff --git a/gnulib b/gnulib
index 4730c3e3692b344effb72d46b3ff92db0bdb797a..0e9d9267fa36c5493b36c0a2b2e422da101ee4b4 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 4730c3e3692b344effb72d46b3ff92db0bdb797a
+Subproject commit 0e9d9267fa36c5493b36c0a2b2e422da101ee4b4