[9] RFR 8136459: MessageDigest.isEqual is not a "simple byte compare"

[Valerie Peng]

Sean,

Do you have one minute to spare for this trivial javadoc update? Can you 
please take a look at the CCC too?
I plan to fast track it once you reviewed it.
Bug: https://bugs.openjdk.java.net/browse/JDK-8136459
Webrev: http://cr.openjdk.java.net/~valeriep/8136459/webrev.00/

Thanks,
Valerie