[lworld] RFR: 8283573: [lworld] Make Object an abstract class

[Frederic Parain]

On Thu, 13 Jan 2022 20:22:37 GMT, Frederic Parain <fparain at openjdk.org> wrote:

> 8283573: [lworld] Make Object an abstract class

Last update addresses the copyright format issue. It also removes the EnableValhalla condition in the interpreter changes to allow the VM to be fully functional even with -XX:-EnableValhalla (we need this configuration to track regressions with mainline, and the current JDK sources support only one version of java.lang.Object which is now abstract in the lworld branch). Last change is the addition of the aarch64 support.

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PR: https://git.openjdk.java.net/valhalla/pull/602