CMake: Replace desktop file installing code with just the file
CMake: Replace desktop file installing code with just the file

Iniquitatis/mgba,Iniquitatis/mgba,libretro/mgba,libretro/mgba,Iniquitatis/mgba,Iniquitatis/mgba,mgba-emu/mgba,mgba-emu/mgba,libretro/mgba,mgba-emu/mgba,mgba-emu/mgba,libretro/mgba,libretro/mgba