VCD can now become optional

cmake_targets/CMakeLists.txt

common/utils/itti/intertask_interface.c

common/utils/itti/intertask_interface_dump.c

common/utils/itti/memory_pools.c

openair-cn/GTPV1-U/gtpv1u_eNB.c

openair-cn/GTPV1-U/nw-gtpv1u/src/NwGtpv1u.c

openair-cn/UDP/udp_eNB_task.c

openair1/PHY/INIT/lte_init.c

openair1/PHY/LTE_TRANSPORT/dlsch_coding.c

openair1/PHY/LTE_TRANSPORT/dlsch_modulation.c

openair1/PHY/LTE_TRANSPORT/dlsch_scrambling.c

openair1/PHY/LTE_TRANSPORT/prach.c

openair1/PHY/LTE_TRANSPORT/ulsch_coding.c

openair1/PHY/LTE_TRANSPORT/ulsch_decoding.c

openair1/PHY/LTE_TRANSPORT/ulsch_modulation.c

openair1/SCHED/phy_procedures_lte_eNb.c

openair1/SCHED/phy_procedures_lte_ue.c

openair1/SIMULATION/ETH_TRANSPORT/emu_transport.c

openair1/SIMULATION/LTE_FEMTO/femtosim.c

openair2/LAYER2/MAC/config.c