(Reuters) - U.S. weapons maker Raytheon Company reported better-than-expected third-quarter profit on Thursday and raised its full-year earnings and sales outlook, helped by higher demand for space programs, weapons and missile warning systems.Shares of the maker of the Patriot missile-defence system were up 1.8% in premarket trading. During an interview with Reuters on Thursday, Chief Financial Officer Toby O'Brien said higher profit margins due to timing were helpful in the quarter and that..