Add libsdl2-2.0-0 to ubuntu-trusty; resolves travis-ci/apt-package-whitelist#3505
Add libsdl2-2.0-0 to ubuntu-trusty; resolves travis-ci/apt-package-whitelist#3505

Packages: libsdl2-2.0-0 libsdl2-dev libsdl2-dbg

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