client/site_tests: add test for graphics memory in sysfs

Make sure the graphics driver exports memory info in sysfs.

BUG=chromium-os:37273
TEST=run_remote_test --build graphics_KernelTest on Link and Daisy

Change-Id: Ied0933c90243e1a37899530312174b5e853d38b5
Signed-off-by: Simon Que <sque@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/39931
Reviewed-by: Anush Elangovan <anush@chromium.org>
2 files changed