[lworld] RFR: 8288135: [lworld] Implement HotSpot flag -XX:+EnablePrimitiveClasses [v11]

[David Simms]

> Runtime component of -XX:+EnablePrimitiveClasses switch

David Simms has updated the pull request incrementally with one additional commit since the last revision:

  Review comments applied

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Changes:
  - all: https://git.openjdk.org/valhalla/pull/727/files
  - new: https://git.openjdk.org/valhalla/pull/727/files/1853e0c6..75113462

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=727&range=10
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=727&range=09-10

  Stats: 8 lines in 3 files changed: 2 ins; 1 del; 5 mod
  Patch: https://git.openjdk.org/valhalla/pull/727.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/727/head:pull/727

PR: https://git.openjdk.org/valhalla/pull/727