graphics/libprojectm: Only builds with default options PULSEAUDIO=ON JACK=OFF
The new version 3.1.1-rc4 appears to have options reworked, but 3.1.1 itselfdoesn't build for unrelated reasons that were reported to the upstream.
Also add USES=sdl
PR: 238086
Reported by: Grzegorz Junka <list1@gjunka.com>