Fix repeated point quads/cubics in convex pr and update convexpaths GM

R=robertphillips@google.com, jvanverth@google.com

Author: bsalomon@google.com

Review URL: https://chromiumcodereview.appspot.com/23034003

git-svn-id: http://skia.googlecode.com/svn/trunk@10744 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed