build: update from gnulib

* gnulib: Update submodule to latest.

diff --git a/gnulib b/gnulib
index 3ef64012bf653379fda629f5a6b619be4c1f2e69..17017ae038b5b369d83b470c882fb4ceb388df1d 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 3ef64012bf653379fda629f5a6b619be4c1f2e69
+Subproject commit 17017ae038b5b369d83b470c882fb4ceb388df1d