[jdk17u-dev] RFR: 8277503: compiler/onSpinWait/TestOnSpinWaitAArch64DefaultFlags.java failed with "OnSpinWaitInst with the expected value 'isb' not found."

[Evgeny Astigeevich]

This is a backport of the test fix.
Tested: release and fastdebug builds

- `make test TEST=hotspot/jtreg/compiler/onSpinWait/TestOnSpinWaitAArch64DefaultFlags.java`: Passed

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Depends on: https://git.openjdk.java.net/jdk17u-dev/pull/103

Commit messages:
 - Backport 7b2d823e842e6a66dbe46b048da44ca9e5485c75

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/107/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=107&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8277503
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/107.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/107/head:pull/107

PR: https://git.openjdk.java.net/jdk17u-dev/pull/107