Include the ASan runtime dylib into the test app bundles on iOS

BUG=228243
R=stuartmorgan@chromium.org, thakis@chromium.org

Review URL: https://codereview.chromium.org/18516005

git-svn-id: http://src.chromium.org/chrome/trunk/src/testing@209918 4ff67af0-8c30-449e-8e8b-ad334ec8d88c