Fixed p4vm not building with debug flags disabled
Fixed p4vm not building with debug flags disabled

Change-Id: I5089319b91c6b62166f4e506762f2552dd20744c

kuujo/onos,gkatsikas/onos,gkatsikas/onos,gkatsikas/onos,oplinkoms/onos,oplinkoms/onos,gkatsikas/onos,oplinkoms/onos,opennetworkinglab/onos,kuujo/onos,gkatsikas/onos,kuujo/onos,kuujo/onos,oplinkoms/onos,oplinkoms/onos,opennetworkinglab/onos,opennetworkinglab/onos,opennetworkinglab/onos,kuujo/onos,opennetworkinglab/onos,gkatsikas/onos,kuujo/onos,oplinkoms/onos,kuujo/onos,opennetworkinglab/onos,oplinkoms/onos