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

[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

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Depends on: https://git.openjdk.org/jdk/pull/10982

Commit messages:
 - Merge branch 'JDK-8294982' into JDK-8294961
 - 8294961: java.base java.lang.reflect.ProxyGenerator uses ASM to generate proxy classes

Changes: https://git.openjdk.org/jdk/pull/10991/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10991&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294961
  Stats: 455 lines in 1 file changed: 45 ins; 196 del; 214 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