RFR: 8265246: Fix macos-Aarch64 build after JDK-8263709

[David Holmes]

Two recent macOS-Aarch64 fixes were merged into my changes without conflict, but needed editing to match my changes:

s/thread/current/

in two places.

Testing: all platform builds in mach5, including macOS-Aarch64 of course (in progress)

Thanks,
David

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Commit messages:
 - 8265246: Fix macos-Aarch64 build after JDK-8263709

Changes: https://git.openjdk.java.net/jdk/pull/3506/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3506&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265246
  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3506.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3506/head:pull/3506

PR: https://git.openjdk.java.net/jdk/pull/3506