[jdk21u-dev] RFR: 8315721: CloseRace.java#id0 fails transiently on libgraal

[Goetz Lindenmaier]

I backport this for parity with 21.0.3-oracle.

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Commit messages:
 - Backport 1be355734da94243e29f0899b53aa1ebdf3bcb79

Changes: https://git.openjdk.org/jdk21u-dev/pull/170/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=170&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315721
  Stats: 5 lines in 1 file changed: 4 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/170.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/170/head:pull/170

PR: https://git.openjdk.org/jdk21u-dev/pull/170