leading slash confuses non-git tools that read .gitignore, like ag

BUG=
R=scroggo@google.com

Author: mtklein@google.com

Review URL: https://chromiumcodereview.appspot.com/21055005

git-svn-id: http://skia.googlecode.com/svn/trunk@10439 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed