[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/inherit_missing_runme.ml

@@ -0,0 +1,10 @@
+open Swig
+open Inherit_missing
+
+let _ =
+  let a = _new_Foo '() and b = new_Bar '() and c = new_Spam '() in
+  assert (_do_blah '(a) as string =  "Foo::blah");
+  assert (_do_blah '(b) as string =  "Bar::blah");
+  assert (_do_blah '(c) as string =  "Spam::blah");
+  assert (_delete_Foo '(a) =  C_void)
+;;