ntimed: add recipe to meta-networking (git version)

Ntimed is an unreleased ntpd replacement being sponsored by the Linux
Foundation. Currently it only includes a work-in-progress client, but for
future use this recipe emits an ntimed-client package and an ntimed meta
package which will pull in client and server.

Signed-off-by: Christopher Larson <kergoth@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>