RFR: 8332360: JVM hangs at exit when running on a uniprocessor

[Coleen Phillimore]

Restored the TryLock in the ReenterI (wait) case with a comment.

Tested with tier1-4.

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Commit messages:
 - 8332360: JVM hangs at exit when running on a uniprocessor

Changes: https://git.openjdk.org/jdk/pull/19293/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19293&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8332360
  Stats: 7 lines in 1 file changed: 7 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/19293.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19293/head:pull/19293

PR: https://git.openjdk.org/jdk/pull/19293