(Makefile) Add dependency tracking
(Makefile) Add dependency tracking

Can be turned off passing MMD= to make

heuripedes/libretro-lutro,RobLoach/libretro-lutro,libretro/libretro-lutro,heuripedes/libretro-lutro,RobLoach/libretro-lutro,libretro/libretro-lutro,libretro/libretro-lutro