Actually run these tests from regrtest.py.

There was no test_main() and the main body was protected
by if __name__ == '__main__' so the test didn't happen
on import either.
diff --git a/Lib/test/test_timeout.py b/Lib/test/test_timeout.py
index 65470d7..6510ca9 100644
--- a/Lib/test/test_timeout.py
+++ b/Lib/test/test_timeout.py
@@ -175,11 +175,11 @@
         pass
 
 
-def main():
+def test_main():
     suite = unittest.TestSuite()
     suite.addTest(unittest.makeSuite(CreationTestCase))
     suite.addTest(unittest.makeSuite(TimeoutTestCase))
     test_support.run_suite(suite)
 
 if __name__ == "__main__":
-    main()
+    test_main()