- add accidenitally dropped create_unix_socket call
- reposition rte_eal_set_socket_permissions to match 17.05 handling of
vhost-user server sockets (and their late binding)
Change-Id: If953b94250ad1c4e9c5f60fef629afd5569ce7b8 Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>