GBA: Add DANGER level, which is ERROR in release and FATAL in debug
GBA: Add DANGER level, which is ERROR in release and FATAL in debug

askotx/mgba,Iniquitatis/mgba,bentley/mgba,fr500/mgba,matthewbauer/mgba,matthewbauer/mgba,Touched/mgba,mgba-emu/mgba,AdmiralCurtiss/mgba,Iniquitatis/mgba,fr500/mgba,libretro/mgba,askotx/mgba,zerofalcon/mgba,sergiobenrocha2/mgba,AdmiralCurtiss/mgba,jeremyherbert/mgba,zerofalcon/mgba,Anty-Lemon/mgba,iracigt/mgba,iracigt/mgba,cassos/mgba,askotx/mgba,mgba-emu/mgba,mgba-emu/mgba,libretro/mgba,iracigt/mgba,AdmiralCurtiss/mgba,Iniquitatis/mgba,sergiobenrocha2/mgba,bentley/mgba,Anty-Lemon/mgba,jeremyherbert/mgba,jeremyherbert/mgba,MerryMage/mgba,Anty-Lemon/mgba,MerryMage/mgba,nattthebear/mgba,libretro/mgba,mgba-emu/mgba,askotx/mgba,Touched/mgba,nattthebear/mgba,Iniquitatis/mgba,cassos/mgba,sergiobenrocha2/mgba,MerryMage/mgba,sergiobenrocha2/mgba,Touched/mgba,jeremyherbert/mgba,libretro/mgba,zerofalcon/mgba,Anty-Lemon/mgba,fr500/mgba,iracigt/mgba,sergiobenrocha2/mgba,fr500/mgba,libretro/mgba,cassos/mgba