[bulk] flying boat = airplane/airccraft

create implication flying_boat -> airplane
create implication flying_boat -> aircraft

Link to request

Not sure if a flying boat is necessarily a type of airplane—though I believe it is—but it's definitely an aircraft.

Removed the "flying boat -> aircraft" implication from the request, since airplane already implicates aircraft.

The aircraft wiki should be updated.

The bulk update request #779 has been approved.