update swig on windows

winx64/bin/swigwin-4.0.0/Examples/test-suite/ocaml/using_extend_runme.ml

@@ -0,0 +1,12 @@
+open Swig
+open Using_extend
+
+let _ =
+  let f = new_FooBar '() in
+  assert (f -> blah (3) as int = 3);
+  assert (f -> blah (3.5) as float = 3.5);
+  assert (f -> blah ("hello") as string = "hello");
+  assert (f -> blah (3, 4) as int = 7);
+  assert (f -> blah (3.5, 7.5) as float = 11.);
+  assert (f -> duh (3) as int = 3)
+;;