By Isla Binnie MADRID (Reuters) -Siemens Gamesa confirmed a gloomy outlook for full-year profits on Thursday, a day after the world’s largest maker of offshore turbines named a new chief executive to try to revive its fortunes. After a series of losses blamed on supply chain disruptions, rising raw material costs, and problems at its onshore division, Chairman Miguel Angel Lopez said the board named a new CEO as part of a “reset”. The company confirmed on Thursday that its most optimistic prediction was for a paper-thin core profit margin of 1%, but warned this metric could be as low as negati…