Reduce and verify fragment output PIQ test draw buffer usage.

- Check GL_MAX_DRAW_BUFFERS implementation limit and usage if shader
  build fails.
- Reduce required GL_MAX_DRAW_BUFFERS from 5 to 4 in explicit location
  fragment output array tests.
- Fix various max binding resource usage checks.

Bug: 18094242
Change-Id: I17e091eb1939fd7ec94789be70be5a069970b697
4 files changed