[lworld] RFR: 8270477: [lworld] bytecode testing API does not emit Q type descriptors

[David Simms]

Fixed bytecodes that need to emit full type descriptors (with their "envelopes") for Q-types

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Commit messages:
 - 8270477: [lworld] bytecode testing API does not emit Q type descriptors

Changes: https://git.openjdk.java.net/valhalla/pull/552/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=552&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8270477
  Stats: 413 lines in 4 files changed: 203 ins; 202 del; 8 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/552.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/552/head:pull/552

PR: https://git.openjdk.java.net/valhalla/pull/552