add the relay node for a dual stack operation for eMBMS (experimental)

openair1/PHY/impl_defs_top.h

openair1/PHY/vars.h

openair1/SCHED/defs.h

openair1/SCHED/phy_procedures_lte_eNb.c

openair1/SCHED/phy_procedures_lte_ue.c

openair2/LAYER2/MAC/extern.h

openair2/LAYER2/MAC/main.c

openair2/LAYER2/MAC/ue_procedures.c

openair2/LAYER2/MAC/vars.h

openair2/RRC/LITE/defs.h

openair2/RRC/LITE/rrc_UE.c

openair2/RRC/LITE/rrc_common.c

openair2/UTIL/OCG/OCG.h

openair2/UTIL/OTG/otg.c

openair2/UTIL/OTG/otg_tx.c

openair2/UTIL/OTG/otg_tx.h

targets/RTAI/USER/lte-softmodem.c

targets/SIMU/EXAMPLES/OSD/WEBXML/template_13.xml

targets/SIMU/EXAMPLES/OSD/WEBXML/template_19.xml

targets/SIMU/EXAMPLES/OSD/WEBXML/template_2.xml