app/proc_info: add metrics displaying
app/proc_info: add metrics displaying

Modify the dpdk-procinfo process to display the newly added metrics.
Added new command line option "--metrics" to display metrics.

Signed-off-by: Reshma Pattan <4d9eb35579760ed1c2db754a6b402039c9c8a1cb@intel.com>
Signed-off-by: Remy Horton <34c343e92f0e27f7a8e26a1d8d2146ae7c7dd1a3@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk