RFR: 8264224: Add macosx-aarch64 to Oracle build configurations

[Kevin Rushforth]

On Tue, 30 Mar 2021 12:34:50 GMT, Erik Joelsson <erikj at openjdk.org> wrote:

>> As I understand it, the intention is to bump the Xcode version for x64 as well, though I must say I would prefer that change to go in separately.
>
> To answer Magnus, on line 1133, we define a different dependency, called "lldb". That dependency is an older devkit which only purpose is to provide lldb for the failure handler when running tests. We need this because we are still running tests on Macos < 10.15, but the new devkit requires 10.15.

I agree that it would be ideal for the update to Xcode 12.x to be done separately. Is there a JBS issue filed for this update? Alternatively, you could use `/issue add nnnnnnn` to add that JBS issue to this PR.

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PR: https://git.openjdk.java.net/jdk/pull/3258