gnulib: update

diff --git a/gnulib b/gnulib
index 678815ea7c4d95e04a0fa6d3b491b3c872c677a7..bd54a45e6e4bcb3ee7359c9b4f1d831a6291148f 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 678815ea7c4d95e04a0fa6d3b491b3c872c677a7
+Subproject commit bd54a45e6e4bcb3ee7359c9b4f1d831a6291148f