lindbg: fix x64 drX access, add raw Ptrace.getfpregs (need LinDbg interface)
lindbg: fix x64 drX access, add raw Ptrace.getfpregs (need LinDbg interface)

pombreda/metasm,davidechiappetta/metasm,jimokkerse/metasm,steeve85/metasm,rootml/metasm,exported/metasm