RFR: 8361647: Report the error reason on failed semaphore calls on macOS

[David Holmes]

Simple enhancement to report the reason for any failure when using the semaphore on macOS. This is to aid in diagnosing another failure.

Testing:
 - tiers 1-3 sanity
 - manually triggered a failure to check output (see JBS)

Thanks

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Commit messages:
 - 8361647: Report the error reason on failed semaphore calls on macOS

Changes: https://git.openjdk.org/jdk/pull/26212/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26212&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361647
  Stats: 18 lines in 1 file changed: 11 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/26212.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26212/head:pull/26212

PR: https://git.openjdk.org/jdk/pull/26212