build: update gnulib submodule to latest
diff --git a/gnulib b/gnulib line changes: +1/-1 index f00af4b..50f95b4 --- a/gnulib +++ b/gnulib
@@ -1 +1 @@ -Subproject commit f00af4baf2c7416c5d7c4674c072ef2a51e40668 +Subproject commit 50f95b448151c1e1695fca2f67cb7991b57e874b