fix compilation for ubuntu 16

cmake_targets/CMakeLists.txt

openair2/NAS/DRIVER/CELLULAR/NASMT/nasmt_device.c

openair2/NAS/DRIVER/CELLULAR/NASRG/nasrg_device.c

openair2/NETWORK_DRIVER/LITE/device.c

openair2/NETWORK_DRIVER/MESH/classifier.c

openair2/NETWORK_DRIVER/MESH/common.c

openair2/NETWORK_DRIVER/MESH/device.c

openair2/NETWORK_DRIVER/MESH/ioctl.c

openair2/NETWORK_DRIVER/MESH/local.h

openair2/NETWORK_DRIVER/MESH/mesh.c

openair2/NETWORK_DRIVER/MESH/proto_extern.h

openair2/NETWORK_DRIVER/UE_IP/common.c

openair2/NETWORK_DRIVER/UE_IP/device.c