tests: update gnulib to latest, to fix test link failure

diff --git a/gnulib b/gnulib
index 14cbee7bc09e5dee154aeb009510c22c02ad69b7..bd35a4e10e52b9fbe25b7280c3c4d9ef4b144c8a 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 14cbee7bc09e5dee154aeb009510c22c02ad69b7
+Subproject commit bd35a4e10e52b9fbe25b7280c3c4d9ef4b144c8a