[lworld] RFR: 8335641: [lworld] add the MigratedValueClass annotation to some classes missing it, some bug fixes

[Vicente Romero]

adding the MigratedValueClass annotation so some classes missing it, plus minor bug fix

-------------

Commit messages:
 - 8335641: [lworld] add the MigratedValueClass to some classes missing it, some bug fixes

Changes: https://git.openjdk.org/valhalla/pull/1155/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1155&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8335641
  Stats: 23 lines in 21 files changed: 20 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/valhalla/pull/1155.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1155/head:pull/1155

PR: https://git.openjdk.org/valhalla/pull/1155