RFR: 8295184: Printing messages with a RecordComponentElement does not include position [v3]

[Srikanth Adayapalam]

> Stash away a copy of the record component declaration from the header for use in diagnostics

Srikanth Adayapalam has updated the pull request incrementally with one additional commit since the last revision:

  Incorporate review comments from Vicente (Thanks!)

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Changes:
  - all: https://git.openjdk.org/jdk/pull/11511/files
  - new: https://git.openjdk.org/jdk/pull/11511/files/804eb9c3..a35c12b8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11511&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11511&range=01-02

  Stats: 5 lines in 3 files changed: 2 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/11511.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11511/head:pull/11511

PR: https://git.openjdk.org/jdk/pull/11511