* China GDP data eases fears of sharp slowdown * But investors still wary on global outlook, stay defensive * Nikkei's technical outlook remains weak * Dentsu down sharply after purchase of Aegis By Sophie Knight TOKYO, July 13 (Reuters) - Japan's Nikkei share average edged up o n Friday to snap a six-session losing streak, its longest since early April, after Chinese growth data matched expectations, slightly easing fears about the state of the global economy.