[code-reflection] Integrated: Add rocm/hip cmake rules - hip backend work in progress

[Gary Frost]

Trying to get the HIPBackend to build.  

Discovered that rocm/hip includes a 'FindHIP' so added that here..  Still working on getting the backend to build.

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Commit messages:
 - Add rocm/hip cmake rules -  hip backend work in progress

Changes: https://git.openjdk.org/babylon/pull/430/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=430&range=00
  Stats: 156 lines in 4 files changed: 106 ins; 17 del; 33 mod
  Patch: https://git.openjdk.org/babylon/pull/430.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/430/head:pull/430

PR: https://git.openjdk.org/babylon/pull/430