app/bbdev: support python3
app/bbdev: support python3

Use of the print function required for python3 compatibility.

Signed-off-by: Louise Kilheeney <7ef5fcae22ac4b0adac1f889b9724cc88ccd2c77@intel.com>
Acked-by: Nicolas Chautru <5844138a49a7cd19205c4efe0c7b4bd431c6ad19@intel.com>

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