Update gm self-test to pass again after r6585
Now depends on only "dashing2" test, not all tests whose name starts with "dashing",
so it should be more resilient in the face of further changes.
TBR=borenet,robertphillips
Review URL: https://codereview.appspot.com/6844104

git-svn-id: http://skia.googlecode.com/svn/trunk@6588 2bbb7eff-a529-9590-31e7-b0007b416f81
25 files changed