[lworld] RFR: 8293127: Valhalla: gcbasher update for new bytecodes [v2]

[Roger Riggs]

> Update bytecode decompiler in hotspot gcbasher to be able to skip over new bytecodes.
> Otherwise, the gcbasher fails when it runs on a value class.

Roger Riggs has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge branch 'lworld' into 8293127-gcbasher
 - Merge branch 'lworld' into 8293127-gcbasher
 - 8293127: Valhalla: gcbasher update for new bytecodes

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

Changes:
  - all: https://git.openjdk.org/valhalla/pull/731/files
  - new: https://git.openjdk.org/valhalla/pull/731/files/33d1fa74..9204891d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=731&range=01
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=731&range=00-01

  Stats: 792523 lines in 10108 files changed: 538804 ins; 152816 del; 100903 mod
  Patch: https://git.openjdk.org/valhalla/pull/731.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/731/head:pull/731

PR: https://git.openjdk.org/valhalla/pull/731