Xstrata says copper output picked up in Q2, committed to Peru

* Output improves in Q2 after sharp drop in Q1 * Xstrata (EUREX: XTAF.EX – news) committed to investing in Peru (Updates with Sartain quote, Q1 output) SANTIAGO, July 1 (Reuters) – World No. 4 copper miner Xstrata said Friday it was confident it would