Add Win8 bots to rebaseline.py, add baselines for Win8

NOTRY=True
BUG=
R=epoger@google.com

Author: borenet@google.com

Review URL: https://codereview.chromium.org/117433003

git-svn-id: http://skia.googlecode.com/svn/trunk@12714 2bbb7eff-a529-9590-31e7-b0007b416f81
10 files changed