[OCaml] Runtime tests for default_arg_values, inherit_missing and some others

Add runtime tests for default_arg_values, inherit_missing,
memberin_extend, rename_predicates, template_inherit,
template_tbase_template, and typedef_classforward_same_name.

Examples/test-suite/ocaml/default_arg_values_runme.ml

@@ -0,0 +1,17 @@
+open Swig
+open Default_arg_values
+
+let _ =
+  let d = new_Display '() in
+  assert (d -> draw1 () as float = 0.);
+  let arg = C_float 12. in
+  assert (d -> draw1 (arg) as float = 12.);
+  let arg = C_float 123. in
+  let p = _createPtr '(arg) in
+  assert (d -> draw2 () as float = 0.);
+  assert (d -> draw2 (p) as float = 123.);
+  assert (d -> bool0 () as bool = false);
+  assert (d -> bool1 () as bool = true);
+  assert (d -> mybool0 () as bool = false);
+  assert (d -> mybool1 () as bool = true)
+;;