Update to newest gnulib.

diff --git a/gnulib b/gnulib
index 5b891d3d9e310d4faa175f3a97921c466c907ba1..0003b01876cb929ab10ac4fe409db20d6e4c1f0e 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 5b891d3d9e310d4faa175f3a97921c466c907ba1
+Subproject commit 0003b01876cb929ab10ac4fe409db20d6e4c1f0e