RFR: 8304031: Classfile API cannot encode Primitive Class as Condy [v2]

[Chen Liang]

> Without this patch, the Classfile API tries to encode PrimitiveClassDesc as CONSTANT_Class_info and error in `toInternalName`.

Chen Liang 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:

 - Prevent primitive class misuse in a few other sites
 - Merge branch 'master' of https://git.openjdk.java.net/jdk into 8304031
 - 8304031: Classfile API cannot encode Primitive Class as Condy

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/12996/files
  - new: https://git.openjdk.org/jdk/pull/12996/files/8f4e1642..df3ed0c0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12996&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12996&range=00-01

  Stats: 83033 lines in 1033 files changed: 50857 ins; 21488 del; 10688 mod
  Patch: https://git.openjdk.org/jdk/pull/12996.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/12996/head:pull/12996

PR: https://git.openjdk.org/jdk/pull/12996