build: update gnulib submodule to latest

diff --git a/gnulib b/gnulib
index a228f539d716ba1120173d7d5bf96bfbdc5e63aa..583c47de09e3fb912baa00ddd405ab66fdad433c 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit a228f539d716ba1120173d7d5bf96bfbdc5e63aa
+Subproject commit 583c47de09e3fb912baa00ddd405ab66fdad433c