[lworld] RFR: 8247569: [lworld] Align with spec for <vnew> methods [v4]

[Vicente Romero]

> Value classes constructor should be named <vnew> instead of <init>. This PR can't be pushed without the corresponding support being available on the VM side

Vicente Romero has updated the pull request incrementally with one additional commit since the last revision:

  javac is generating <vnew> method for abstract value classes

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

Changes:
  - all: https://git.openjdk.org/valhalla/pull/771/files
  - new: https://git.openjdk.org/valhalla/pull/771/files/6264d345..eaa6b66d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=771&range=03
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=771&range=02-03

  Stats: 34 lines in 10 files changed: 4 ins; 16 del; 14 mod
  Patch: https://git.openjdk.org/valhalla/pull/771.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/771/head:pull/771

PR: https://git.openjdk.org/valhalla/pull/771