gnulib: update to latest upstream changeset

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

diff --git a/.gnulib b/.gnulib
index 7e7c5c7952b7de1e33c8eba891cc425d5d8d7803..0404c9ae2845cbf93d71b295b67d6c8bd39382d8 160000 (submodule)
--- a/.gnulib
+++ b/.gnulib
@@ -1 +1 @@
-Subproject commit 7e7c5c7952b7de1e33c8eba891cc425d5d8d7803
+Subproject commit 0404c9ae2845cbf93d71b295b67d6c8bd39382d8