[code-reflection] Integrated: Streamlining OpTk and preparing to move out of HAT core

[Gary Frost]

I have been moving common code into OpTk 

Also added a strawman Txfmr class for simplifying common transformations

I plan to move OpTk (well the parts not requireing HAT) up to its own lib

This code leaves code artifacts (HAT_GIX)  in generated C99. I need to track thoose down. They seem to compile ok and run..

-------------

Commit messages:
 - Streamlining OpTk and preparing to move out of HAT core

Changes: https://git.openjdk.org/babylon/pull/753/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=753&range=00
  Stats: 998 lines in 17 files changed: 586 ins; 197 del; 215 mod
  Patch: https://git.openjdk.org/babylon/pull/753.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/753/head:pull/753

PR: https://git.openjdk.org/babylon/pull/753