update swig on windows

winx64/bin/swigwin-4.0.0/Examples/test-suite/python/li_cdata_runme.py

@@ -0,0 +1,9 @@
+
+from li_cdata import *
+
+s = "ABC abc"
+m = malloc(256)
+memmove(m, s)
+ss = cdata(m, 7)
+if ss != "ABC abc":
+    raise "failed"