[Piglit] [PATCH] Add simple glPolygonOffset test

[Eric Anholt]

Kenneth Graunke <kenneth at whitecape.org> writes:

> From: Keith Packard <keithp at keithp.com>
>
> This isn't fancy, it just sets the polygon offset and then draws one
> object on top of another. Tests combinations of lines/points/fills.
>
> v2 [Ken]:
> - Rebase onto Piglit master, reworking includes and config section now
>   that we use Waffle for the framework.  Fix author and copyright date.
>   Remove nested function (suggested by Brian Paul).  Use
>   piglit_present_results().  Use stdbool rather than GLboolean.
>
> Signed-off-by: Keith Packard <keithp at keithp.com>
> Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>

Reviewed-by: Eric Anholt <eric at anholt.net>
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