JDK 14 RFR of JDK-8202385: Annotation to mark serial-related fields and methods

[Joe Darcy]

Hello,

Returning to some old work [1], please review the addition of a 
java.io.Serial annotation type for JDK 14 to mark serial-related fields 
and methods:

    webrev: http://cr.openjdk.java.net/~darcy/8202385.3/
    CSR: https://bugs.openjdk.java.net/browse/JDK-8217698

Thanks,

-Joe

[1] Previous review threads:

http://mail.openjdk.java.net/pipermail/core-libs-dev/2018-May/053055.html

http://mail.openjdk.java.net/pipermail/core-libs-dev/2018-August/054801.html