added -O to SIM_CXXFLAGS, and --profile-cfuncs to default VERILATOR_ARGS
added -O to SIM_CXXFLAGS, and --profile-cfuncs to default VERILATOR_ARGS

cambridgehackers/connectal,csail-csg/connectal,cambridgehackers/connectal,csail-csg/connectal,chenm001/connectal,hanw/connectal,hanw/connectal,chenm001/connectal,csail-csg/connectal,cambridgehackers/connectal,cambridgehackers/connectal,chenm001/connectal,chenm001/connectal,cambridgehackers/connectal,hanw/connectal,hanw/connectal,hanw/connectal,csail-csg/connectal,chenm001/connectal,csail-csg/connectal