After five seasons HBO’s epic “Game of Thrones” won its first best-drama award Sunday night at the 67th Primetime Emmy Awards in Los Angeles, besting the final season of four-time winner “Mad Men” in a mild upset. The sprawling medieval fantasy show also won Emmys on Sunday for writing, directing and for supporting actor Peter Dinklage, who plays the scorned scion of a powerful family who is forced to survive by his wits.