integration fix: various fixes

- fix compilation of dlsim/ulsim/oaisim by defining some needed
  global variables
- fix compilation of oaisim: compile coding and params_libconfig
- fix running of if4p5 with low CPU count (oaisim was not working
  on the machine 'haswell' because of this)

openair1/SIMULATION/LTE_PHY/dlsim.c

@@ -69,6 +69,8 @@ double t_rx_min = 1000000000; /*!< \brief initial min process time for rx */
 int n_tx_dropped = 0; /*!< \brief initial max process time for tx */
 int n_rx_dropped = 0; /*!< \brief initial max process time for rx */
 
+int codingw = 0;
+
 void handler(int sig)
 {
   void *array[10];

openair1/SIMULATION/LTE_PHY/ulsim.c

@@ -89,6 +89,8 @@ nfapi_tx_request_pdu_t tx_pdu_list[MAX_NUM_TX_REQUEST_PDU];
 nfapi_tx_request_t TX_req;
 Sched_Rsp_t sched_resp;
 
+int codingw = 0;
+
 void
 fill_nfapi_ulsch_config_request(nfapi_ul_config_request_pdu_t *ul_config_pdu,
 				uint8_t                        cqi_req,