[lworld] RFR: 8287768: [lw4] Record component may not have the name isValueObject

[Vicente Romero]

Javac should issue an error if a record declares a record component named: `isValueObject`

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Commit messages:
 - 8287768: [lw4] Record component may not have the name isValueObject

Changes: https://git.openjdk.org/valhalla/pull/722/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=722&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8287768
  Stats: 5 lines in 3 files changed: 3 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/valhalla/pull/722.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/722/head:pull/722

PR: https://git.openjdk.org/valhalla/pull/722