Accept build tools license.

Authored by markwei on Apr 12 2017, 4:23 PM.

Description

Accept build tools license.

Summary: Attempt to fix circle ci breakage https://circleci.com/gh/material-motion/material-motion-android/155

Reviewers: O2 Material Motion, Material Motion, featherless

Reviewed By: O2 Material Motion, Material Motion, featherless

Tags: Material Motion

Differential Revision: http://codereview.cc/D3038