gnulib: update

diff --git a/gnulib b/gnulib
index ea6cb044ca0ab57045900a494a0e4ae39ed5372c..5bb169c3be1f80fb22ee63d51b43dfdb1ac22d2a 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit ea6cb044ca0ab57045900a494a0e4ae39ed5372c
+Subproject commit 5bb169c3be1f80fb22ee63d51b43dfdb1ac22d2a