By Amindeh Blaise Atabong YAOUNDE (Reuters) – Cameroon’s anti-corruption agency is investigating claims by miner and commodities trader Glencore Plc that it paid bribes to officials at state-run companies in exchange for favours, an official said on Tuesday. Dieudonne Massi Gams, chairman of the central African country’s National Anti-Corruption Commission (CONAC), told Reuters that the agency had set up a commission of inquiry since complaints made by civil society and local media. “We are working on it and will take our time in order to produce good results,” Gams said, without giving furthe…