Fix missing linebreaks in RetroArch output.

alcaro@stacked ~/Desktop/minir $ cores/RetroArch/retroarch roms/testcore_libretro.so 
RetroArch [WARN] :: [libretro WARN] :: [2048] unable to load game data: save directory not set.RetroArch [WARN] :: [libretro WARN] :: [2048] unable to save game data: save directory not set.alcaro@stacked ~/Desktop/minir $ 
This doesn't really look right. Let's fix it.