Remove line from HX_STACK_FRAME hash

HX_STACK_FRAME file line hash should not include line, because we need to compare it to breakpoints that aren't on the same line as the function definition. We need to compare them to the current executing file and line. For reference see https://code.google.com/p/hxcpp/issues/detail?id=259 and https://groups.google.com/d/msg/haxedev/i-DDPnJfdGM/ppknx6tKXbcJ