[lworld] Integrated: 8338262: [lworld] Make tests require flagless until JDK-8338261 is fixed

[Tobias Hartmann]

Workaround for [JDK-8338261 [lworld] FieldLayoutAnalyzer::checkSubClasses fails with NullPointerException: Cannot read field](https://bugs.openjdk.org/browse/JDK-8338261).

Best regards,
Tobias

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Commit messages:
 - 8338262: [lworld] Make tests require flagless until JDK-8338261 is fixed

Changes: https://git.openjdk.org/valhalla/pull/1202/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1202&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338262
  Stats: 7 lines in 2 files changed: 0 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/valhalla/pull/1202.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1202/head:pull/1202

PR: https://git.openjdk.org/valhalla/pull/1202