java-1.8.0-openjdk security update

1:1.8.0.392.b08-2 - Revert jcmd move as jcmd will not operate without tools.jar - Related: RHEL-13577 1:1.8.0.392.b08-1 - Update to shenandoah-jdk8u392-b08 GA - Update release notes for shenandoah-8u392-b08. - Update generatetarball.sh to be closer to upstream vanilla script inc. no more ECC...