Fix #6677: allow to disable warning 39 through an [@ocaml.warning] attribute on the first value binding.
Fix #6677: allow to disable warning 39 through an [@ocaml.warning] attribute on the first value binding.

msprotz/ocaml,eliberis/ocaml,gerdstolpmann/ocaml,yunxing/ocaml,eliberis/ocaml,yunxing/ocaml,gerdstolpmann/ocaml,eliberis/ocaml,msprotz/ocaml,eliberis/ocaml,yunxing/ocaml,gerdstolpmann/ocaml,yunxing/ocaml,msprotz/ocaml,gerdstolpmann/ocaml,msprotz/ocaml,yunxing/ocaml,gerdstolpmann/ocaml,eliberis/ocaml,msprotz/ocaml