disambiguate 2 pairs of overmap symbols

Pawn shop and Military surplus stores looked identical.
Banks and garages also look identical.

I don't know the best solution. What i do know is that orientation for
banks doesn't matter, and Oddzball probably had the right idea when he
used '$' for banks.

Because they have multiple entrances, orientation for garages probably
matters less than surplus stores, and you're likely looting garages if
you want a vehicle, so I am replacing <>V^ for garages
with 'O', which is what lots use.

pawn shops: <>^V grey
surplus: <>^V bold white
banks: $ grey
garages: O bold white