McDonald’s (MCD) has extended its popular $5 U.S. value meal to the end of this year as it seeks to win over financially strapped consumers.The Chicago-based quick service restaurant chain had initially brought back the value meal for a limited time this summer in response to consumer complaints that the company’s meals had gotten too expensive at an average price of about $15 U.S. Now, McDonald’s has extended into December the popular $5 U.S. meal that consists of a McDouble or McChicken sandwich, small fries, four-piece chicken nuggets and a small drink.The company said that 80% of…