Update to newest gnulib.

diff --git a/gnulib b/gnulib
index b2b037e380eda6aef711ea5f625e26fb4a663c6e..8089c00979a5b089cff592c6b91420e595657167 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit b2b037e380eda6aef711ea5f625e26fb4a663c6e
+Subproject commit 8089c00979a5b089cff592c6b91420e595657167