Adds filter exclusions for arm and win8 bots

For the time being I have to duplicate these. Separately I'm going to
investigate centralizing these exclusions.

BUG=401201
TEST=none
TBR=sbc@chromium.org

Review URL: https://codereview.chromium.org/445133002

git-svn-id: http://src.chromium.org/chrome/trunk/src/testing@287936 4ff67af0-8c30-449e-8e8b-ad334ec8d88c