build: update gnulib submodule to latest

[debian/gzip] / gnulib

diff --git a/gnulib b/gnulib
index 0dfdfdcbedd4aa1536927101dff21b4a87d917e1..e21985ad14508137d75b0dccf064adfc4e5888c6 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 0dfdfdcbedd4aa1536927101dff21b4a87d917e1
+Subproject commit e21985ad14508137d75b0dccf064adfc4e5888c6