build: update gnulib submodule to latest

diff --git a/gnulib b/gnulib
index ddea1a41eb1843f0df47f8185dc205c2990f1750..11d02ecc71521bcea19cb8ae7c05523635e42a5c 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit ddea1a41eb1843f0df47f8185dc205c2990f1750
+Subproject commit 11d02ecc71521bcea19cb8ae7c05523635e42a5c