fixed simple_switch Makefile: thrift compiler was being invoked all the time because of bad file path
fixed simple_switch Makefile: thrift compiler was being invoked all the time because of bad file path

p4lang/behavioral-model,p4lang/behavioral-model,hanw/behavioral-model,ops-p4/ops-p4dp,p4lang/behavioral-model,p4lang/behavioral-model,hanw/behavioral-model,ops-p4/ops-p4dp,ops-p4/ops-p4dp,ops-p4/ops-p4dp,hanw/behavioral-model,hanw/behavioral-model,hanw/behavioral-model,p4lang/behavioral-model