[jdk17u-dev] RFR: 8302226: failure_handler native.core should wait for coredump to finish

[Goetz Lindenmaier]

Clean backport to improve testing with failure handler.

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Commit messages:
 - Backport 6120319afdba98b5ff547b870a0260479e8b683c

Changes: https://git.openjdk.org/jdk17u-dev/pull/3604/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3604&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8302226
  Stats: 10 lines in 2 files changed: 6 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3604.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3604/head:pull/3604

PR: https://git.openjdk.org/jdk17u-dev/pull/3604