update swig on windows

winx64/bin/swigwin-4.0.0/Lib/mzscheme/std_common.i

@@ -0,0 +1,23 @@
+/* -----------------------------------------------------------------------------
+ * std_common.i
+ *
+ * SWIG typemaps for STL - common utilities
+ * ----------------------------------------------------------------------------- */
+
+%include <std/std_except.i>
+
+%apply size_t { std::size_t };
+
+%{
+#include <string>
+
+SWIGINTERNINLINE
+std::string swig_scm_to_string(Scheme_Object *x) {
+    return std::string(SCHEME_STR_VAL(x));
+}
+
+SWIGINTERNINLINE
+Scheme_Object *swig_make_string(const std::string &s) {
+    return scheme_make_string(s.c_str());
+}
+%}