graphics_dEQP: update blacklist.

This adds initial failures from graphics_dEQP.gles2.performance for
mccloud and stumpy.

TEST=pylint
BUG=chromium:46102

Change-Id: I4d08e310a04377068dd676e821e83083bae7afa0
Reviewed-on: https://chromium-review.googlesource.com/263625
Trybot-Ready: Ilja Friedel <ihf@chromium.org>
Tested-by: Ilja Friedel <ihf@chromium.org>
Reviewed-by: Dominik Behr <dbehr@chromium.org>
1 file changed