Add SWIG_PYTHON_NO_DEBUG macro for building Debug wrappers against the Python Debug dll

Lib/python/pyruntime.swg

@@ -1,6 +1,12 @@
 %insert(runtime) %{
-/* Python.h has to appear first */
-#include <Python.h>
+#if defined(_DEBUG) && defined(SWIG_PYTHON_NO_DEBUG)
+/* Use debug wrappers with the Python release dll */
+# undef _DEBUG
+# include <Python.h>
+# define _DEBUG
+#else
+# include <Python.h>
+#endif
 %}
 
 %insert(runtime) "swigrun.swg";         /* SWIG API */
@@ -13,4 +19,4 @@
 
 #if defined(SWIGPYTHON_BUILTIN)
 %insert(runtime) "builtin.swg";		/* Specialization for classes with single inheritance */
-#endif
+#endif