[lworld] RFR: 8364034: [lworld] Pre-register boxing classes in class loaders

[Frederic Parain]

Add pre-registration of boxing classes when a class loader is registered by the VM.

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Commit messages:
 - Fix tab
 - Add pre-registration of boxing classes

Changes: https://git.openjdk.org/valhalla/pull/1517/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1517&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8364034
  Stats: 45 lines in 3 files changed: 36 ins; 3 del; 6 mod
  Patch: https://git.openjdk.org/valhalla/pull/1517.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1517/head:pull/1517

PR: https://git.openjdk.org/valhalla/pull/1517