added missing library for bm-switchapi when compiling the switch drivers for bmv2
added missing library for bm-switchapi when compiling the switch drivers for bmv2

USC-NSL/FlowRadar-P4,p4lang/p4factory,p4lang/p4factory,USC-NSL/FlowRadar-P4,p4lang/p4factory,USC-NSL/FlowRadar-P4,USC-NSL/FlowRadar-P4,p4lang/p4factory,p4lang/p4factory,p4lang/p4factory,USC-NSL/FlowRadar-P4,USC-NSL/FlowRadar-P4