Add --add-ignored option to rebaseline.py

R=senorblanco@chromium.org, epoger@google.com
BUG=skia:1600

Review URL: https://codereview.chromium.org/27517002

git-svn-id: http://skia.googlecode.com/svn/trunk@11809 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed