[code-reflection] RFR: [docs] Babylon and HAT builds and with HAT testing updated

[Juan Fumero]

Babylon and HAT builds and with HAT testing updated

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Commit messages:
 - [docs] Babylon and HAT builds and with HAT testing updated

Changes: https://git.openjdk.org/babylon/pull/712/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=712&range=00
  Stats: 136 lines in 2 files changed: 102 ins; 23 del; 11 mod
  Patch: https://git.openjdk.org/babylon/pull/712.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/712/head:pull/712

PR: https://git.openjdk.org/babylon/pull/712