RFR: 8266038: Move newAddress() to JVMDebugger

[Kevin Walls]

On Tue, 27 Apr 2021 09:19:34 GMT, Yasumasa Suenaga <ysuenaga at openjdk.org> wrote:

> SA has `newAddress()` to create `Address` instance, however it is declared in each debugger classes (e.g. `LinuxDebugger`). So we can't access it directly from `VM` class.
> 
> Before SA improvement for ZGC in [JDK-8220624](https://bugs.openjdk.java.net/browse/JDK-8220624), we need to move `newAddress()` to super class (`JVMDebugger`).

Marked as reviewed by kevinw (Committer).

Moving this common method up the hierarchy looks good to me.

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PR: https://git.openjdk.java.net/jdk/pull/3714