lldpd: Add recipe

lldpd is a 802.1AB implementation, a L2 network discovery protocol.
It also supports CDP, EDP and various other protocols.

Signed-off-by: Fabio Berton <fabio.berton@ossystems.com.br>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>