Update to the newest gnulib.

diff --git a/gnulib b/gnulib
index 661c55d6c287e1e6122e0ec03668ec859b6d806a..d1e92798e443517d04d72458834a206665926fdc 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 661c55d6c287e1e6122e0ec03668ec859b6d806a
+Subproject commit d1e92798e443517d04d72458834a206665926fdc