[code-reflection] Integrated: Slight cleanup of HatPtOp and added copyright to enum

[Gary Frost]

HATPtr housekeeping/cleanup and added copyright to BInaryOpEnum

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Commit messages:
 - Slight cleanup of HatPtOp and added copyright to enum

Changes: https://git.openjdk.org/babylon/pull/773/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=773&range=00
  Stats: 68 lines in 3 files changed: 45 ins; 22 del; 1 mod
  Patch: https://git.openjdk.org/babylon/pull/773.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/773/head:pull/773

PR: https://git.openjdk.org/babylon/pull/773