Add nvml for GPU monitoring (squashed)

  Based on mwhite73 <marvin.white@gmail.com> implementation

  Linked to the api system

  Also fix Makefile to support standard c++ files
  This prevent nvcc use without device code

Signed-off-by: Tanguy Pruvot <tanguy.pruvot@gmail.com>
api: fix stats gpu mask filter
nvml: last fixes for vstudio