Update to the newest gnulib.

diff --git a/gnulib b/gnulib
index 962a577b7685e0aa938b8241460c12484ae725c3..bb3fd10e6309f017618a12b2c10d3bfb813bfc08 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 962a577b7685e0aa938b8241460c12484ae725c3
+Subproject commit bb3fd10e6309f017618a12b2c10d3bfb813bfc08