skpmaker: make the SKP slightly more interesting (add a border)

This will help with render_pictures self-testing
BUG=skia:1942
R=rmistry@google.com

Author: epoger@google.com

Review URL: https://codereview.chromium.org/137993008

git-svn-id: http://skia.googlecode.com/svn/trunk@13086 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed