update swig on windows

winx64/bin/swigwin-4.0.0/Examples/test-suite/lua/grouping_runme.lua

@@ -0,0 +1,18 @@
+require("import")	-- the import fn
+import("grouping")	-- import lib into global
+g=grouping --alias
+
+-- catching undefined variables
+local env = _ENV -- Lua 5.2
+if not env then env = getfenv () end -- Lua 5.1
+setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
+
+assert(g.test1(5) == 5)
+g.test2(42) -- Return value is int* packed into userdata. We can't do anything with it
+
+assert(g.test3 == 37)
+g.test3 = 42
+assert(g.test3 == 42)
+
+assert(g.NEGATE ~= nil)
+assert(g.do_unary(5, g.NEGATE) == -5)