8251160: Fix "no comment" warnings in java.logging

[Daniel Fuchs]

Hi,

Please find below a doc-only fix for:

8251160: Fix "no comment" warnings in java.logging
https://bugs.openjdk.java.net/browse/JDK-8251160

CSR: https://bugs.openjdk.java.net/browse/JDK-8251534

webrev:
http://cr.openjdk.java.net/~dfuchs/webrev_8251160/webrev.00/

The documentation of the serial form of java.util.logging.Level
and java.util.logging.LogRecord is improved to avoid doclint
warnings.

best regards,

-- daniel