git: openjdk/jdk8u-ri: 8201793: (ref) Reference object should not support cloning

[Poonam Bajaj]

Changeset: 58ec25de
Author:    Poonam Bajaj <poonam at openjdk.org>
Date:      2022-04-28 20:42:08 +0000
URL:       https://git.openjdk.java.net/jdk8u-ri/commit/58ec25de2f383144417eb000efacecb78b30395c

8201793: (ref) Reference object should not support cloning

Reviewed-by: mchung, kbarrett, iris
Backport-of: bd18ef4c18081d04c89ee9f94e98fd2ef1e2bf38

! jdk/src/share/classes/java/lang/ref/Reference.java
+ jdk/test/java/lang/ref/ReferenceClone.java