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