RFR: 8294961: java.base java.lang.reflect.ProxyGenerator uses ASM to generate proxy classes [v3]

[Adam Sotona]

> java.base java.lang.reflect.ProxyGenerator uses ASM to generate proxy classes and this patch converts it to use Classfile API.
> 
> This pull request suppose to chain on the 8294982: Implementation of Classfile API https://github.com/openjdk/jdk/pull/10982
> 
> Please review.
> 
> Thank you,
> Adam

Adam Sotona 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 six additional commits since the last revision:

 - j.l.r.ProxyGenerator improvements
   Author: Mandy Chung <mchung at openjdk.org>
 - Merge branch 'JDK-8294982' into JDK-8294961
 - j.l.r.ProxyGenerator fix - Classfile API moved under jdk.internal.classfile package
 - Merge branch 'JDK-8294982' into JDK-8294961
 - Merge branch 'JDK-8294982' into JDK-8294961
 - 8294961: java.base java.lang.reflect.ProxyGenerator uses ASM to generate proxy classes

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10991/files
  - new: https://git.openjdk.org/jdk/pull/10991/files/c242a4a2..9d671a04

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10991&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10991&range=01-02

  Stats: 499 lines in 65 files changed: 51 ins; 258 del; 190 mod
  Patch: https://git.openjdk.org/jdk/pull/10991.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10991/head:pull/10991

PR: https://git.openjdk.org/jdk/pull/10991