By Emma Pinedo and Christina Thykjaer MADRID (Reuters) – Spain’s Catholic Church sought to give more credence to an investigation into the alleged sexual abuse of minors, saying on Tuesday a law firm would coordinate and audit the effort, in a move a victims’ group has already dismissed as a “smoke screen”. The allegations are only gaining traction now in Spain, years after similar scandals rocked the Church in other countries such as the United States, Ireland and France. Spanish prosecutors said last week they were investigating 68 cases, but El Pais newspaper reported two months ago it had …