RFR: 8273376: Zero: Disable vtable/itableStub gtests

[Jie Fu]

On Mon, 6 Sep 2021 10:44:15 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Simple test bug fix.
> 
> Additional testing:
>  - [x] Linux x86_64 Server still runs the test
>  - [x] Linux x86_64 Zero now skips the test

Looks fine to me.

The copyright year also needs to be updated.
Thanks.

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Marked as reviewed by jiefu (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/5377