net/memif: fix abstract socket address length
net/memif: fix abstract socket address length

This fixes using abstract sockets with memifs.
We were not passing the exact addr_len,
which requires zeroing the remaining sun_path
and doesn't appear well in other utilities (e.g. lsof -U)

Signed-off-by: Nathan Skrzypczak <0fa918c439baf617eab84c5ae2a48ee9db643966@gmail.com>
Reviewed-by: Jakub Grajciar <80f619e109c6efd382b3a6accd36cbd33d9669a2@cisco.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk