(test_thread.py): modifications to quiet it up when not running as a script.

(testall.py): added test_thread to the list of regression tests.
diff --git a/Lib/test/testall.py b/Lib/test/testall.py
index 94620e7..6d3b86f 100644
--- a/Lib/test/testall.py
+++ b/Lib/test/testall.py
@@ -24,6 +24,7 @@
 	 'test_struct',
 	 'test_errno',
 	 'test_dl',
+	 'test_thread',
 	 ]
 
 if __name__ == '__main__':