[lworld] RFR: 8265423: [lworld] Provide experimental support for generating a single class file per primitive class [v3]

[Srikanth Adayapalam]

> Use -XDunifiedValRefClass option to javac to get unified class file generation for primitive classes. Note: Javac will require some tweaks to consume such files, this is WIP.

Srikanth Adayapalam has updated the pull request incrementally with one additional commit since the last revision:

  Tests for experimental unified mode class generation for primitive classes

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Changes:
  - all: https://git.openjdk.java.net/valhalla/pull/394/files
  - new: https://git.openjdk.java.net/valhalla/pull/394/files/75632dcd..5443d48c

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=valhalla&pr=394&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=valhalla&pr=394&range=01-02

  Stats: 566 lines in 6 files changed: 566 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/394.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/394/head:pull/394

PR: https://git.openjdk.java.net/valhalla/pull/394