gnulib: Update submodule

diff --git a/gnulib b/gnulib
index ea58a72d4db3c4729e51de2633845ee381dd00b6..2da5a78bb0b876a4d02db9152c586a243a34379a 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit ea58a72d4db3c4729e51de2633845ee381dd00b6
+Subproject commit 2da5a78bb0b876a4d02db9152c586a243a34379a