add gm to show bug in stroked-text in drawPosText

BUG=skia:
R=fmalita@google.com, bungeman@google.com, fmalita@chromium.org

Author: reed@google.com

Review URL: https://codereview.chromium.org/198083003

git-svn-id: http://skia.googlecode.com/svn/trunk@13777 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed