SEOUL, S. Korea — Renault-Samsung has premiered the QMX, a concept version of a future crossover utility vehicle. It’s the South Korean subsidiary’s version of the Renault Koleus CUV concept that was shown last fall at the Paris auto show. The Koleus will be manufactured by Renault’s South Korean subsidiary starting at the end of this year. Renault-Samsung QMX ConceptRenault is trying to make the best out of its global production network. That’s…