Adds dependency on sanitizer
The santizer target is empty if no sanitizers are defined, otherwise
it contains the necessary targets. Because of this we can always
depend on it. Without this dep asan builds fail.
R=brettw@chromium.org, danno@chromium.org
Review URL: https://codereview.chromium.org/
697763002
Patch from Scott Violet <sky@chromium.org>.
Cr-Commit-Position: refs/heads/master@{#25094}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25094
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00