[Piglit] [PATCH 0/9] ARB_separate_shader_objects tests

[Ian Romanick]

This is (mostly) a resend of the initial set of
ARB_separate_shader_objects tests.  Most of these have been sent to the
list several times.  Since the last send, I add the last two tests.  I'm
starting ARB_sso work in Mesa again, and I'd like to get the initial
tests landed sooner rather than later.

I believe that every entry point added by the extension get some
exercise by this series.

There are more tests needed.

  - More geometry shader tests.

  - Tests that create several vertex shaders, several geometry shaders,
    and several fragment shaders, and try to use all of them in as many
    combinations as possible.

  - Same as the previous, but use rendezvous-by-location.

  - Mean tests for glActiveProgram.

  - Mean tests for glGetProgramPipelineInfoLog.