Updated toolchain build, with perf improvements

cf https://github.com/OpenDingux/buildroot/actions/runs/3101426374

Gcw0 + Lepus build

Defaults change

Digital gamepad is now default, and start + select opens menu (can be changed in the menu according to preference)

This avoids having an unusable port for lepus devices that don't have a power button nor joystick.

V0.1

GCW0 + Lepus multi opk
Rumble disabled