[jdk21u-dev] RFR: 8335150: Test LogGeneratedClassesTest.java fails on rpmbuild mock enviroment

[SendaoYan]

Hi all,

This pull request contains a backport of commit [403fa376](https://github.com/openjdk/jdk23u/commit/403fa3760f629873258447cc9aefa09f9a27e7a4) from the [openjdk/jdk23u](https://git.openjdk.org/jdk23u) repository.

The commit being backported was authored by SendaoYan on 20 Aug 2024 and had no reviewers.

Make the test more robustness, test fix only, no risk.

Thanks!

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Commit messages:
 - Backport 403fa3760f629873258447cc9aefa09f9a27e7a4

Changes: https://git.openjdk.org/jdk21u-dev/pull/938/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=938&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8335150
  Stats: 18 lines in 1 file changed: 7 ins; 6 del; 5 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/938.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/938/head:pull/938

PR: https://git.openjdk.org/jdk21u-dev/pull/938