upgrade to use latest clang on linux (via mason) and os x (via xcode)
upgrade to use latest clang on linux (via mason) and os x (via xcode)

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