Integrate "screamer" build of qemu-system-ppc

• https://github.com/rhizomedotorg/qemu-ppc-screamer
• https://gitlab.com/emulation-as-a-service/emulators/qemu-eaas/-/tree/screamer
  • registry.gitlab.com/emulation-as-a-service/emulators/qemu-eaas:screamer

nativeConfig: -net nic,model=sungem -accel tcg,tb-size=2048 -machine mac99 -prom-env boot-args=-v -prom-env vga-ndrv?=true -cpu g4 -m 896 -g 800x600x32 -device VGA,edid=on,vgamem_mb=64,xres=800,yres=600

---

ℹ PulseAudio server is not correctly set, workaround: -audiodev pa,id=pa,server=/emucon/data/sockets/pulse-iosocket