Mobile SAM's patriot missile buffed

To deal with orca spam problem:
-Mobile SAM missile fires a bit faster (Burst Delay of 1 sec. instead of 1.4 sec).
-Damage spread increased slightly from 14 -> 16, to deal with large concentrations of air units.
-Damage increased 55 -> 60, which divides as 2/3rds of an orca's HP. Important because Infantry rockets and Bike Rockets do 30 damage each, so one rocket + 1 patriot == kill.

SAM turret damage also increased 55 -> 60, for same reason.