[lworld] Integrated: 8293120: [lworld] javac is rejecting correct class declaration that has a combination of value and sealed modifiers

[Vicente Romero]

Fixing a parser error that doesn't allow modifiers `sealed` + (`value` or `identity`) in a class declaration

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Commit messages:
 - 8293120: [lworld] javac is rejecting correct class declaration that has a combination of value and sealed modifiers

Changes: https://git.openjdk.org/valhalla/pull/730/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=730&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293120
  Stats: 4 lines in 1 file changed: 3 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/730.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/730/head:pull/730

PR: https://git.openjdk.org/valhalla/pull/730