The Wild boar disappears once you villagers have killed it

Another identical discussion. A boar should not disappear. Islamic civs should be able to kill them if they’re attacking villagers (but not consume their food), but they should not be able to deny the carcass to another civ by having it disappear. There’s also the matter of a carcass blocking a building from being placed. That should also be changed.

@SavageEmpire566 perhaps these two should be merged?