gnulib: update

diff --git a/gnulib b/gnulib
index bd22b19aee6af003640e65281c9939b268766ee4..c67e3c0414da820f845c9c91c105094e87d865d0 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit bd22b19aee6af003640e65281c9939b268766ee4
+Subproject commit c67e3c0414da820f845c9c91c105094e87d865d0