RFR 8022259 MakeClasslist tool is buggy and its README is out of date.

[harold seigel]

Hi,

Please review this small fix for bug 8022259.  This change fixes a bug 
in the MakeClasslist tool and updates its README.txt file.

webrev: http://cr.openjdk.java.net/~hseigel/bug_8022259/ 
<http://cr.openjdk.java.net/%7Ehseigel/bug_8022259/>

bug: http://bugs.sun.com/view_bug.do?bug_id=8022259

JBS bug: https://jbs.oracle.com/bugs/browse/JDK-8022259

I tested the change by creating a testlist using the modified 
MakeClasslist tool and following the information in the changed 
README.txt file.

Thanks! Harold