net/tap: add eBPF program file

net/tap: add eBPF program file

File tap_bpf_program.c was added with two ELF sections
corresponding to two BPF programs and one BPF map.

Section cls_q - BPF classifier to classify packets to their
corresponding queue after an RSS hash was calculated on the packet
and saved in skb->cb[1]
Section l3_l4 - BPF action to calculate RSS hash on packet
layers 3 and 4
This file is not part of DPDK tree compilation.

Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
Acked-by: Pascal Mazon <pascal.mazon@6wind.com>