Fixes the broken android-platform build (build that uses .mk files). TBR=andrew@webrtc.org,henrike@webrtc.org BUG= Review URL: https://webrtc-codereview.appspot.com/1777004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@4314 4adac7df-926f-26a2-2b94-8c16560cd09d