adding example/networking/net_monitor.py
adding example/networking/net_monitor.py

Aggregates incoming network traffic
outputs source ip, destination ip, the number of their network traffic, and current time

Co-authored-by: gist-banana <ed5d979b6f6406ea406196c3f14b3caa6e2e51cd@gist.ac.kr>
iovisor/bcc,tuxology/bcc,iovisor/bcc,brendangregg/bcc,brendangregg/bcc,brendangregg/bcc,brendangregg/bcc,iovisor/bcc,tuxology/bcc,tuxology/bcc,iovisor/bcc,iovisor/bcc,brendangregg/bcc,tuxology/bcc,tuxology/bcc