JDK 15 RFR of JDK-8237805: Use inline @jls @jvms in core libs where appropriate

[Joe Darcy]

Hello,

Inline forms of the @jls and @jvms javadoc tags are now available 
(JDK-8235926). I made a pass over the files in java.base to take 
advantage of the new feature:

    http://cr.openjdk.java.net/~darcy/8237805.0/

Thanks,

-Joe