Update to the newest gnulib.

diff --git a/gnulib b/gnulib
index 27d2acd196b983afad774c109966bc7b44c4a85c..ea71051f3737fb5ad6d08b5c29211a70ceb50195 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 27d2acd196b983afad774c109966bc7b44c4a85c
+Subproject commit ea71051f3737fb5ad6d08b5c29211a70ceb50195