Mark the svg anim tests as flaky on Linux as well as Win.
Mark the svg anim tests as flaky on Linux as well as Win.

TBR=pdr@chromium.org
BUG=486962

Review URL: https://codereview.chromium.org/1139963002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@195276 bbb929c8-8fbe-4397-9dbb-9b2b20218538

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk