[lworld] RFR: 8328704: [REDO] [lworld] Missing barrier after value object construction

[Tobias Hartmann]

Added a missing barrier after value object construction.

Thanks,
Tobias

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Commit messages:
 - Removed ToDos
 - Removed ToDos
 - 8328704: [REDO] [lworld] Missing barrier after value object construction

Changes: https://git.openjdk.org/valhalla/pull/1062/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1062&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328704
  Stats: 59 lines in 8 files changed: 42 ins; 14 del; 3 mod
  Patch: https://git.openjdk.org/valhalla/pull/1062.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1062/head:pull/1062

PR: https://git.openjdk.org/valhalla/pull/1062