[lworld] Integrated: 8334334: [lworld] more test coverage for value classes

[Vicente Romero]

adding a reflection test for value classes

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Commit messages:
 - 8334334: [lworld] more test coverage for value classes

Changes: https://git.openjdk.org/valhalla/pull/1136/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1136&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334334
  Stats: 117 lines in 2 files changed: 116 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/1136.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1136/head:pull/1136

PR: https://git.openjdk.org/valhalla/pull/1136