[Intel-gfx] [PATCH i-g-t v4 0/2] Analogue/VGA frame comparison support

[Paul Kocialkowski]

Changes since v3:
* Squashed configure.ac changes in this series

Changes since v2:
* Changed analogue in favor of analog
* Integrated analog frame match fixup in the original commit
* Rebased on top of the new revisions of the series this depends on

Changes since v1:
* Split analogue frame comparison to igt_frame, using cairo surfaces
* Added a chamelium helper for analogue frame checking and frame dumping