emulationstation: new package

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
sdl2: new package

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
sdl2_gfx: new package

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
sdl2_image: new package

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
sdl2_mixer: new package

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
sdl2_net: new package

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
sdl2_ttf: new package

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>