[code-reflection] Integrated: Towards a cleaner hat bld run script

[Gary Frost]

I have a cleaner proposal for hat build scripting

Previous

java @hat/clean
java @hat/bld 
java @hat/run ffi-opencl mandel

Now

java hat/HAT.java clean
java hat/HAT.java bld
java hat/HAT.java run ffi-opencl mandel


Also we can chain

java hat/HAT.java clean run ffi-opencl mandel

Note that 'run' now only builds the dependencies needed.

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Commit messages:
 - Towards a cleaner hat bld run script

Changes: https://git.openjdk.org/babylon/pull/456/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=456&range=00
  Stats: 549 lines in 3 files changed: 544 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/babylon/pull/456.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/456/head:pull/456

PR: https://git.openjdk.org/babylon/pull/456