Fixing a bug in the -R implementation of get_stats when not all the kernels are present and adding an options to not take the diff of stats when collecting them.
Fixing a bug in the -R implementation of get_stats when not all the kernels are present and adding an options to not take the diff of stats when collecting them.

tgrogers/gpgpu-sim_simulations,tgrogers/gpgpu-sim_simulations,tgrogers/gpgpu-sim_simulations,tgrogers/gpgpu-sim_simulations