[lworld] RFR: 8199429: [lworld] value type (re)constructors expressions should not …

[Jesper Steen Møller]

…be discardable as per https://bugs.openjdk.org/browse/JDK-8199429 .

This is a first stab at it, only with the manual marking on a method, and without the loading of the annotation in ClassReader.

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Commit messages:
 - 8199429: [lworld] value type (re)constructors expressions should not be discardable

Changes: https://git.openjdk.org/valhalla/pull/1274/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1274&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8199429
  Stats: 127 lines in 9 files changed: 127 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/valhalla/pull/1274.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1274/head:pull/1274

PR: https://git.openjdk.org/valhalla/pull/1274