Suppress inspector/tracing-session-id.html

inspector/tracing-session-id.html started failing after r174194. Suppressing
the failure for now to let the devs take a look.

TBR=haraken@chromium.org
BUG=

Review URL: https://codereview.chromium.org/282423002

git-svn-id: svn://svn.chromium.org/blink/trunk@174213 bbb929c8-8fbe-4397-9dbb-9b2b20218538