Add phonon to ubuntu-precise; resolves travis-ci/apt-package-whitelist#3143
Add phonon to ubuntu-precise; resolves travis-ci/apt-package-whitelist#3143

Packages: phonon phonon4qt5 libphonon-dev libphonon4qt5-dev libphonon4 libphonon4qt5-4 libphononexperimental-dev libphonon4qt5experimental-dev libphononexperimental4 libphonon4qt5experimental4 phonon-backend-null phonon4qt5-backend-null

travis-ci/apt-package-whitelist,travis-ci/apt-package-whitelist