[code-reflection] Integrated: Fixed up schema parsing from the backend. Mostly for debug

[Gary Frost]

I want to enable access to the schema passed as part of the argsled.  

This will allow backends (native code) to dump the args passed for a kernel.

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Commit messages:
 - Fixed up schema parsing from the backend.  Mostly for debug

Changes: https://git.openjdk.org/babylon/pull/121/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=121&range=00
  Stats: 1376 lines in 16 files changed: 686 ins; 601 del; 89 mod
  Patch: https://git.openjdk.org/babylon/pull/121.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/121/head:pull/121

PR: https://git.openjdk.org/babylon/pull/121