Update to the newest gnulib.

diff --git a/gnulib b/gnulib
index dd07b74893bc2fee44743f775a887930d04e9a85..427249c61666dcf649e6ba18fb327cdf71c45780 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit dd07b74893bc2fee44743f775a887930d04e9a85
+Subproject commit 427249c61666dcf649e6ba18fb327cdf71c45780