skip all tests under the lib directory
skip all tests under the lib directory

R=nweiz@google.com

Review URL: https://codereview.chromium.org//916523002

grouma/test,kevmoo/test,d2m/test,kevmoo/test,kevmoo/test,apwilson/test,d2m/test,greglittlefield-wf/test,grouma/test,grouma/test,greglittlefield-wf/test,iglherme/Guttiest,iglherme/Guttiest,greglittlefield-wf/test,apwilson/test,iglherme/Guttiest,apwilson/test,d2m/test