Add /webrtc/modules/audio_device/android/test/{bin,gen,libs} to .gitignore

R=henrike@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2416004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4983 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/.gitignore b/.gitignore
index e2c021a..c31c886 100644
--- a/.gitignore
+++ b/.gitignore
@@ -89,6 +89,9 @@
 /tools/swarm_client
 /tools/valgrind
 /tools/win
+/webrtc/modules/audio_device/android/test/bin/
+/webrtc/modules/audio_device/android/test/gen/
+/webrtc/modules/audio_device/android/test/libs/
 /webrtc/supplement.gypi
 /webrtc/video_engine/test/android/bin
 /webrtc/video_engine/test/android/gen