Added named (but not numbered) attributes to sys.getwindowsversion() test.

Lib/test/test_sys.py

@@ -219,6 +219,10 @@ class SysModuleTest(unittest.TestCase):
         self.assertIsInstance(v.build, int)
         self.assertIsInstance(v.platform, int)
         self.assertIsInstance(v.service_pack, str)
+        self.assertIsInstance(v.service_pack_minor, int)
+        self.assertIsInstance(v.service_pack_major, int)
+        self.assertIsInstance(v.suite_mask, int)
+        self.assertIsInstance(v.product_type, int)
         self.assertEqual(v[0], v.major)
         self.assertEqual(v[1], v.minor)
         self.assertEqual(v[2], v.build)