Disable 'recursive polymorphic variants' on 5.1 too

Author: jmid

test/ppx_deriving_qcheck/deriver/qcheck/test_textual.ml

@@ -813,7 +813,7 @@ let test_recursive_poly_variant () =
   *)
   let ocaml_release =
     Scanf.sscanf Sys.ocaml_version "%i.%i" (fun major minor -> (major,minor)) in
-  if ocaml_release < (5,1)
+  if ocaml_release <= (5,1)
   then ()
   else check_eq ~expected ~actual "deriving recursive polymorphic variants"
 

test/ppx_deriving_qcheck/deriver/qcheck2/test_textual.ml

@@ -725,7 +725,7 @@ let test_recursive_poly_variant () =
   *)
   let ocaml_release =
     Scanf.sscanf Sys.ocaml_version "%i.%i" (fun major minor -> (major,minor)) in
-  if ocaml_release < (5,1)
+  if ocaml_release <= (5,1)
   then ()
   else check_eq ~expected ~actual "deriving recursive polymorphic variants"