dwarf from nvcc

I've add some support of DWARF debug info from nvidia nvcc to my dwarfdump . As everyone knows dwarf is over-complicated, fat and just disgusting - however, nvidia was able to take his nausea to a new level relocs their cuda-gdb does not contains reloc_howto_type for CUDA relocs - it's special kind of bare minimal open-source when they publish as little code as possible. So my implementation…