tracks → courses Relation

File in src/engine/tracks	Includes file in courses
Harbour.cpp	harbour / track.h
LuigiRaceway.cpp	staff_ghost_data.h
MarioRaceway.cpp	staff_ghost_data.h
PodiumCeremony.cpp	staff_ghost_data.h
RoyalRaceway.cpp	staff_ghost_data.h