RFR: 8360936: Test compiler/onSpinWait/TestOnSpinWaitAArch64.java fails after JDK-8359435 [v2]

[Evgeny Astigeevich]

> Test compiler/onSpinWait/TestOnSpinWaitAArch64.java needs debug info to identify a position of spin wait instructions in generated code. Release builds might not generate needed debug info.
> 
> This PR adds a requirement for the test to be run on debug builds only.
> 
> Tested:
> - Fastdebug: test passed
> - Slowdebug: test passed.
> - Release: test skipped.

Evgeny Astigeevich has updated the pull request incrementally with one additional commit since the last revision:

  Simplify requirement for debug build

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/26072/files
  - new: https://git.openjdk.org/jdk/pull/26072/files/b2ba0a92..e91036bc

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26072&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26072&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/26072.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26072/head:pull/26072

PR: https://git.openjdk.org/jdk/pull/26072