RFR: 8268192: LambdaMetafactory with invokespecial causes VerificationError [v2]

[Dan Smith]

> Small bug fix.

Dan Smith has updated the pull request incrementally with one additional commit since the last revision:

  Clean up validation of implKind REF_invokeSpecial

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4403/files
  - new: https://git.openjdk.java.net/jdk/pull/4403/files/74c346a1..149fb55b

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4403&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4403&range=00-01

  Stats: 8 lines in 1 file changed: 0 ins; 4 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4403.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4403/head:pull/4403

PR: https://git.openjdk.java.net/jdk/pull/4403