hdl/modules/wb_position_calc/Manifest.py: update Manifest

Now, it includes the error counters modules
hdl/modules/dsp_cores_pkg.vhd: update top files interface

 - Updated top "position_calc" files interface

 - Moved SDB records to this file. They were located
	 on the bpm-sw repository. It makes more sense
	 to reference them here.
hdl/modules/*: change location of SDB structures again.