Fix dependency resolving issues with mesa & mesa-freedreno on hammerhead

osk-sdl & charging-sdl depend on mesa-gl but currently mesa-freedreno-gl does not provide mesa-gl, but just the so:libGL.so.1 form. Fix that by adding an explicit provides for mesa-freedreno-gl.

The other change is to explicitly depend on mesa-freedreno-glapi and mesa-freedreno-gl to not use the pmbootstrap "multiple provider" code which doesn't support this scenario.

Fixes postmarketOS/pmbootstrap#1809