LOS ANGELES (Reuters) – Veteran Irish rockers U2 pulled off a surprise at Apple Incs event to launch new products on Tuesday, making its latest album available for free on Apples iTunes online store. The Grammy Award-winning band performed at the Cupertino, California event, at which Apple unveiled two new iPhones, a smart watch and a mobile payments system. U2 released its new 11-track Songs of Innocence live on stage with Apple Chief Executive Officer Tim Cook. The album immediately appeared in iTunes users music libraries. …