travis: Add gstreamer1.0-plugins-bad to deps
travis: Add gstreamer1.0-plugins-bad to deps

jodal/mopidy,jcass77/mopidy,mokieyue/mopidy,adamcik/mopidy,tkem/mopidy,jcass77/mopidy,mokieyue/mopidy,mopidy/mopidy,vrs01/mopidy,vrs01/mopidy,jodal/mopidy,kingosticks/mopidy,mopidy/mopidy,kingosticks/mopidy,ZenithDK/mopidy,adamcik/mopidy,ZenithDK/mopidy,tkem/mopidy,ZenithDK/mopidy,tkem/mopidy,jcass77/mopidy,vrs01/mopidy,mokieyue/mopidy,ZenithDK/mopidy,tkem/mopidy,jodal/mopidy,kingosticks/mopidy,mokieyue/mopidy,mopidy/mopidy,vrs01/mopidy,adamcik/mopidy