tcpdump: move from meta-oe to meta-networking

Signed-off-by: Zongchun Yu <Zongchun.Yu@freescale.com>
Signed-off-by: Joe MacDonald <joe@deserted.net>
tcpreplay: add recipe

tcpreplay - a suite of GPLv3 licensed tools for UNIX operating systems
which gives you the ability to use previously captured traffic in libpcap
format to test a variety of network devices.

Signed-off-by: Zongchun Yu <Zongchun.Yu@freescale.com>
Signed-off-by: Joe MacDonald <joe@deserted.net>