Add an option to rebaseline.py to mark tests as ignore-failure.

R=epoger@google.com, epoger

Review URL: https://codereview.chromium.org/24195018

git-svn-id: http://skia.googlecode.com/svn/trunk@11358 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed