Add CHANGES entry

4912.	[test]		Improved the reliability of the 'cds' system test.
			[GL #136]

(cherry picked from commit c92bacec)

CHANGES

+4912.	[test]		Improved the reliability of the 'cds' system test.
+			[GL #136]
+
 4911.	[test]		Improved the reliability of the 'mkeys' system test.
 			[GL #128]