tests: add --veryVerbose / -V

BUG=skia:
R=caryclark@google.com

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/135723013

git-svn-id: http://skia.googlecode.com/svn/trunk@13226 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed