Update to newest gnulib.

diff --git a/gnulib b/gnulib
index 5cdec0ff5ecf34474d90d8b57f50a148449cda0c..050f21384806c88a1227e435b7dd32fef5737e1e 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 5cdec0ff5ecf34474d90d8b57f50a148449cda0c
+Subproject commit 050f21384806c88a1227e435b7dd32fef5737e1e