lte-softmodem: add "-ldl" options to linkage

cmake_targets/CMakeLists.txt

@@ -1625,7 +1625,7 @@ add_executable(lte-softmodem
   ${T_SOURCE}
   )
 
-target_link_libraries (lte-softmodem
+target_link_libraries (lte-softmodem -ldl
   -Wl,--start-group
   RRC_LIB S1AP_LIB S1AP_ENB GTPV1U SECU_CN SECU_OSA UTIL HASHTABLE SCTP_CLIENT UDP SCHED_LIB PHY LFDS L2 ${MSC_LIB} ${RAL_LIB} ${NAS_UE_LIB} ${ITTI_LIB} ${MIH_LIB} 
   -Wl,--end-group )