Added test skip under Windows, as not applicable there.

Lib/test/test_logging.py

@@ -2331,6 +2331,7 @@ for when, exp in (('S', 1),
 
 class HandlerTest(BaseTest):
 
+    @unittest.skipIf(os.name == 'nt', 'WatchedFileHandler not appropriate for Windows.')
     @unittest.skipUnless(threading, 'Threading required for this test.')
     def test_race(self):
         # Issue #14632 refers.