Enable ASAN build

Requires Clang 3.1 or higher to be installed.

R=epoger@google.com

Review URL: https://codereview.chromium.org/18205007

git-svn-id: http://skia.googlecode.com/svn/trunk@9891 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed