build: update gnulib submodule to latest

diff --git a/gnulib b/gnulib
index 44cec52a5ff4e57658c717d57d61693587b6e299..41e7b7e0d159d8ac0eb385964119f350ac9dfc3f 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 44cec52a5ff4e57658c717d57d61693587b6e299
+Subproject commit 41e7b7e0d159d8ac0eb385964119f350ac9dfc3f