libchromeos: disable accelerated video decode on sandybridge.

BUG=chromium:521249
TEST=emerge-lumpy libchromeos, verify cmdline is added

(cherry-picked from commit 4df5afdfdac0417e33903866abd04643dca17d60)

Change-Id: I073eab02f2b108a8f9cb1a8089890560352b1fc0
Reviewed-on: https://chromium-review.googlesource.com/295556
Commit-Queue: Haixia Shi <hshi@chromium.org>
Trybot-Ready: Haixia Shi <hshi@chromium.org>
Tested-by: Haixia Shi <hshi@chromium.org>
Reviewed-by: Bertrand Simonnet <bsimonnet@chromium.org>
1 file changed