gnulib: update

diff --git a/gnulib b/gnulib
index 4430dd023d6c2b7b63a87fa62dcc2360c5a34a12..dcf27bef48c9800d5a2be8349226f73f1b8ff2e5 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 4430dd023d6c2b7b63a87fa62dcc2360c5a34a12
+Subproject commit dcf27bef48c9800d5a2be8349226f73f1b8ff2e5