Qt: Disable CMake policy CMP0071 (fixes #1028)
Qt: Disable CMake policy CMP0071 (fixes #1028)

Iniquitatis/mgba,Iniquitatis/mgba,Anty-Lemon/mgba,Anty-Lemon/mgba,mgba-emu/mgba,libretro/mgba,mgba-emu/mgba,mgba-emu/mgba,mgba-emu/mgba,Iniquitatis/mgba,libretro/mgba,libretro/mgba,Anty-Lemon/mgba,Anty-Lemon/mgba,libretro/mgba,libretro/mgba,Iniquitatis/mgba