Update to the newest gnulib.

diff --git a/gnulib b/gnulib
index e979e268f05361154186a64d9814d457098c4fd8..dd07b74893bc2fee44743f775a887930d04e9a85 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit e979e268f05361154186a64d9814d457098c4fd8
+Subproject commit dd07b74893bc2fee44743f775a887930d04e9a85