[OCaml] Fix director_pass_by_value

Add a directorin typemap for SWIGTYPE.

Add director_frob_runme.ml, director_pass_by_value_runme.ml, and
director_unroll_runme.ml.

This commit fixes most of the director-related warnings in the OCaml
test suite. Of the director tests that are currently included in the
OCaml test suite, director_basic and director_property are the only
ones which give warnings (due to issues with typecheck typemaps).

Examples/test-suite/ocaml/director_pass_by_value_runme.ml

@@ -0,0 +1,24 @@
+open Swig
+open Director_pass_by_value
+
+let passByVal = ref [| |]
+
+let director_pass_by_value_Derived ob meth args =
+  match meth with
+    | "virtualMethod" -> passByVal := Array.append !passByVal [|args|]; C_void
+    | _ -> (invoke ob) meth args
+
+let d =
+  new_derived_object
+    new_DirectorPassByValueAbstractBase
+    (director_pass_by_value_Derived)
+    '()
+
+let _ =
+  let caller = new_Caller '() in
+  assert (caller -> call_virtualMethod (d) = C_void);
+  assert (Array.length !passByVal = 1);
+  let a = List.hd (fnhelper (!passByVal.(0))) in
+  assert (a -> getVal () as int = 0x12345678);
+  assert (a -> "~" () = C_void);
+;;