[jdk11u-dev] RFR: 8266318: Switch to macos prefix for macOS bundles

[Goetz Lindenmaier]

I backport this for parity with 11.0.16-oracle.

platform.m4: Resolved copyright.
jib-proviles.js: macos-aarch64 not listed. Skipped.

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Commit messages:
 - Backport 096e9e5d13183f947089b5c7923890591490a2ce

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/958/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=958&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266318
  Stats: 20 lines in 3 files changed: 2 ins; 4 del; 14 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/958.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/958/head:pull/958

PR: https://git.openjdk.java.net/jdk11u-dev/pull/958