Update to the newest gnulib.

diff --git a/gnulib b/gnulib
index 7c908caf99f302f3d5adec377c01f032328a7e6b..1480501f4f8d47a8eea203c5b180262888e28bba 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 7c908caf99f302f3d5adec377c01f032328a7e6b
+Subproject commit 1480501f4f8d47a8eea203c5b180262888e28bba