[code-reflection] RFR: [hat] Rollback specific buffer-accessor for OpenCL buffer allocation

[Juan Fumero]

[hat] Rollback specific buffer-accessor for OpenCL buffer allocation

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Commit messages:
 - [hat] cuda-backend fixed
 - [hat] memory buffer accessor rollback to RW

Changes: https://git.openjdk.org/babylon/pull/759/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=759&range=00
  Stats: 21 lines in 9 files changed: 0 ins; 7 del; 14 mod
  Patch: https://git.openjdk.org/babylon/pull/759.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/759/head:pull/759

PR: https://git.openjdk.org/babylon/pull/759