RFR: 8167446: Add back PermGenSize and MaxPermGenSize

[Max Ockner]

Hello,
Please Review this small change.

http://cr.openjdk.java.net/~mockner/8167446/
https://bugs.openjdk.java.net/browse/JDK-8167446

Added PermSize and MaxPermSize to obsolete flags table. They are 
recognized but ignored.

The bug title says "PermGenSize" and "MaxPermGenSize" but the comment 
says "PermSize" and MaxPermSize". Which one is correct?

Tested both options on java -version. Nothing happens, but I don't get 
an "Unrecognized ..." error.

Thanks,
Max