RFR: 8246774: implement Record Classes as a standard feature in Java [v13]

[Vicente Romero]

> 8246774: implement Record Classes as a standard feature in Java

Vicente Romero has updated the pull request incrementally with one additional commit since the last revision:

  removing reference to unused jcod file from test

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/290/files
  - new: https://git.openjdk.java.net/jdk/pull/290/files/5bfbde59..3e472bc3

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=290&range=12
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=290&range=11-12

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/290.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/290/head:pull/290

PR: https://git.openjdk.java.net/jdk/pull/290