[code-reflection] Integrated: Hat cleanup jextraction

[Gary Frost]

The bldr script jextraction capability handling is still 'evolving' in preparation for jextract based opencl and cuda backends. 

Here we simplified the script by allowing jextract to accept the opencl/gl capabilities and set relevant options.

The nbody example used CLwrap and GLwrap (requiring jextractions).  I changed the header-name to opengl_h from the default glut_h.  

I cleaned up sanity script as well.

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Commit messages:
 - Fixed up sanity script and removed whitespace
 - Fixed up sanity script
 - Cleaning up jextractions in build. GLWrap now uses opengl_h (instead of glut_h)

Changes: https://git.openjdk.org/babylon/pull/312/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=312&range=00
  Stats: 1149 lines in 9 files changed: 470 ins; 122 del; 557 mod
  Patch: https://git.openjdk.org/babylon/pull/312.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/312/head:pull/312

PR: https://git.openjdk.org/babylon/pull/312