update swig on windows

winx64/bin/swigwin-4.0.0/Examples/lua/functest/example.c

@@ -0,0 +1,25 @@
+/* File : example.c */
+
+/* A global variable */
+double Foo = 3.0;
+
+int add1(int x, int y)
+{
+   return x+y;
+}
+
+void add2(int x, int *y, int *z)
+{
+   *z = x+*y;
+}
+
+int add3(int x, int y, int *z)
+{
+   *z = x-y;
+   return x+y;
+}
+
+void add4(int x, int *y)
+{
+   *y += x;
+}