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

[Mikael Vidstedt]

This adds the necessary macosx-aarch64 support to the build configurations at Oracle.

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Commit messages:
 - 8264224: Add macosx-aarch64 to Oracle build configurations

Changes: https://git.openjdk.java.net/jdk/pull/3258/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3258&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8264224
  Stats: 55 lines in 1 file changed: 38 ins; 0 del; 17 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3258.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3258/head:pull/3258

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