update swig on windows

winx64/bin/swigwin-4.0.0/Examples/octave/funcptr2/example.i

@@ -0,0 +1,20 @@
+/* File : example.i */
+%module swigexample
+
+%feature("autodoc", 1);
+
+%{
+#include "example.h"
+%}
+
+/* Wrap a function taking a pointer to a function */
+extern int  do_op(int a, int b, int (*op)(int, int));
+
+/* Now install a bunch of "ops" as constants */
+%callback("%(upper)s");
+int add(int, int);
+int sub(int, int);
+int mul(int, int);
+%nocallback;
+
+extern int (*funcvar)(int,int);