Disables some modules_unittests on Android.

BUG=3445
R=henrik.lundin@webrtc.org, kwiberg@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/19629004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6325 4adac7df-926f-26a2-2b94-8c16560cd09d