travis: declare compiler and try QUIET mode
travis: declare compiler and try QUIET mode

Project-OSRM/node-osrm,KnockSoftware/node-osrm,oxidase/node-osrm,Project-OSRM/node-osrm,KnockSoftware/node-osrm,oxidase/node-osrm,KnockSoftware/node-osrm,oxidase/node-osrm,Project-OSRM/node-osrm,KnockSoftware/node-osrm