Update to the newest gnulib.

diff --git a/gnulib b/gnulib
index 6ebad7abf8bccb2c63e8b13fc0be81216c3b0cc3..9a26e7043fa95b4c9ee4576ce8c0ac15668e695e 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 6ebad7abf8bccb2c63e8b13fc0be81216c3b0cc3
+Subproject commit 9a26e7043fa95b4c9ee4576ce8c0ac15668e695e