[SMTV2] add the tokens of cvc4 as keywords
[SMTV2] add the tokens of cvc4 as keywords

ssaavedra/why3,ssaavedra/why3,jpdeplaix/why3,ssaavedra/why3,douglas-larocca/why3,jpdeplaix/why3,douglas-larocca/why3,douglas-larocca/why3,jpdeplaix/why3