gnulib: update

diff --git a/gnulib b/gnulib
index bd54a45e6e4bcb3ee7359c9b4f1d831a6291148f..e78c0c11704500893203872898640bb23162a6f0 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit bd54a45e6e4bcb3ee7359c9b4f1d831a6291148f
+Subproject commit e78c0c11704500893203872898640bb23162a6f0