.travis.yml: Upgrade to Qt 5.5 to try to fix the shader problem in travis
.travis.yml: Upgrade to Qt 5.5 to try to fix the shader problem in travis

benlau/quickandroid,benlau/quickandroid,benlau/androidnative.pri,benlau/quickandroid,benlau/androidnative.pri,benlau/quickandroid,benlau/androidnative.pri