Update gnulib

diff --git a/gnulib b/gnulib
index 5d1b1fefb1998e0ec59dba3bc1be1993e4eb6be3..9ef06e399fb536e508fcf303aa101e03ce26b787 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 5d1b1fefb1998e0ec59dba3bc1be1993e4eb6be3
+Subproject commit 9ef06e399fb536e508fcf303aa101e03ce26b787