RFR: 8265129: Add intrinsic support for JVM.getClassId [v7]

[Denghui Dong]

> 8265129: Add intrinsic support for JVM.getClassId

Denghui Dong has updated the pull request incrementally with one additional commit since the last revision:

  update

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3470/files
  - new: https://git.openjdk.java.net/jdk/pull/3470/files/9fd0550b..24ce77b0

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3470&range=06
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3470&range=05-06

  Stats: 83 lines in 12 files changed: 32 ins; 42 del; 9 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3470.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3470/head:pull/3470

PR: https://git.openjdk.java.net/jdk/pull/3470