Apparently nobody else likes testing and debugging GEM coherency issues.
However, this also means that QA is skipping these vital tests. Split
out a set of canaries into igt/gem_concurrent_blit and keep the rest in
igt/gem_concurrent_all.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89497
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
