[code-reflection] RFR: Fix modeling of expressions with record symbols

[Paul Sandoz]

Fix modeling of expressions with record symbols.

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

Commit messages:
 - Fix modeling of expressions with record symbols.

Changes: https://git.openjdk.org/babylon/pull/661/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=661&range=00
  Stats: 68 lines in 2 files changed: 66 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/babylon/pull/661.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/661/head:pull/661

PR: https://git.openjdk.org/babylon/pull/661