[MacPorts] #37427: atlas: Add gcc48 variant

#37427: atlas: Add gcc48 variant -------------------------------+--------------------- Reporter: macsforever2000@… | Owner: vince@… Type: enhancement | Status: new Priority: Normal | Milestone: Component: ports | Version: Keywords: | Port: atlas -------------------------------+--------------------- Please add a gcc48 variant to atlas. -- Ticket URL: <https://trac.macports.org/ticket/37427> MacPorts <http://www.macports.org/> Ports system for Mac OS