add_location_to_breakpoint -> breakpoint::add_location

Make add_location_to_breakpoint be a method of struct breakpoint.

A patch later in the series will move this to base_breakpoint, but for
now, it needs to be here.

Change-Id: I5bdc2ec1a7c2d66f26f51bf6f6adc8384a90b129
2 files changed