* Euro zone leaders agree measures to help indebted members * Brazil Bovespa up 3.23 pct, Mexico IPC up 1.42 pct By Rachel Uranga and Lizbeth Salazar MEXICO CITY, June 29 (Reuters) - Latin American stocks surged on Friday, after euro zone leaders agreed to support troubled member states, and Mexican shares were further bolstered on bets of quick reforms in the wake of a presidential elections on Sunday. The MSCI Latin American stock index leapt 4.98 percent, though the index st