RFR: 8372585: TestVerifyLoopOptimizationsHitsMemLimit fails with product builds

[Christian Hagedorn]

Updating `TestVerifyLoopOptimizationsHitsMemLimit.java` in [JDK-8360510](https://bugs.openjdk.org/browse/JDK-8360510) missed to add `-XX:+IgnoreUnrecognizedVMOptions` which now leads to a test failure with product builds. This is fixed with this patch

Thanks,
Christian

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Commit messages:
 - 8372585: TestVerifyLoopOptimizationsHitsMemLimit fails with product builds

Changes: https://git.openjdk.org/jdk/pull/28504/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28504&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372585
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/28504.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28504/head:pull/28504

PR: https://git.openjdk.org/jdk/pull/28504