NEW YORK (Reuters) - Oil futures gave up early gains on Thursday, as OPEC and its partner Russia gave mixed signals about possible further output cuts to mitigate fallout from the coronavirus outbreak that has amplified concerns about weakened global oil demand.Brent crude futures lost 36 cents to $54.92 a barrel by 11:36 a.m. U.S. West Texas Intermediate (WTI) crude futures rose 11 cents to $50.86 a barrel.In early trade, both contracts rose more than $1 a barrel. They pared gains as traders..