update swig on windows

winx64/bin/swigwin-4.0.0/Examples/test-suite/constructor_explicit.i

@@ -0,0 +1,19 @@
+/* Swig 1.3.6 fails to understand the "explicit" keyword.
+   SF Bug #445233, reported by Krzysztof Kozminski
+   <kozminski@users.sf.net>. 
+*/
+
+%module constructor_explicit
+%inline %{
+
+class Foo {
+public:
+   explicit Foo() { }
+   explicit Foo(int) {};
+};
+
+Foo test(Foo x) {
+   return x;
+}
+
+%}