Rename layouts.ml to jkind.ml (#1886)

Author: goldfirere

middle_end/convert_primitives.ml

@@ -160,8 +160,8 @@ let convert (prim : Lambda.primitive) : Clambda_primitives.primitive =
       ~effects:Only_generative_effects
       ~coeffects:Has_coeffects
       ~native_name:"caml_obj_dup"
-      ~native_repr_args:[P.Prim_global, P.Same_as_ocaml_repr Layouts.Sort.Value]
-      ~native_repr_res:(P.Prim_global, P.Same_as_ocaml_repr Layouts.Sort.Value))
+      ~native_repr_args:[P.Prim_global, P.Same_as_ocaml_repr Jkind.Sort.Value]
+      ~native_repr_res:(P.Prim_global, P.Same_as_ocaml_repr Jkind.Sort.Value))
   | Punbox_float -> Punbox_float
   | Pbox_float m -> Pbox_float m
   | Punbox_int bi -> Punbox_int bi