Show TEST_NA failure in yellow

TEST_NA is different from normal failure. Let's make it yellow to
distinguish them.

BUG=None
TEST=Check TEST_NA failure is shown in yellow

Change-Id: If7639c9128dabfe0b3f2841d4bc79c7f93117e23
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/51276
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
2 files changed