Update to the newest gnulib.

diff --git a/gnulib b/gnulib
index b82548a7dffb05f6707454ccdaa630fa4484172e..d2aa9c2fa1dea0b638fa1031a56f690722052279 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit b82548a7dffb05f6707454ccdaa630fa4484172e
+Subproject commit d2aa9c2fa1dea0b638fa1031a56f690722052279