[code-reflection] RFR: Draft: ANF Experimental Code Model

[Ian Graves]

Experiments with Administrative Normal Form (A-Normal Form; ANF) transformations in the code model. See https://github.com/igraves/babylon-anf for additional code using these changes.

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Commit messages:
 - Additional updates

Changes: https://git.openjdk.org/babylon/pull/239/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=239&range=00
  Stats: 220 lines in 2 files changed: 219 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/babylon/pull/239.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/239/head:pull/239

PR: https://git.openjdk.org/babylon/pull/239