[code-reflection] Integrated: [hat][docs] Some useful links added

[Juan Fumero]

Some useful links added

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Commit messages:
 - [hat][docs] Some useful links added

Changes: https://git.openjdk.org/babylon/pull/604/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=604&range=00
  Stats: 4 lines in 1 file changed: 4 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/babylon/pull/604.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/604/head:pull/604

PR: https://git.openjdk.org/babylon/pull/604