(Reuters) -Activist investor Elliott Investment Management has built a roughly $1 billion stake in Match Group and plans to push the Tinder dating app owner to take steps to improve its performance, the Wall Street Journal reported on Monday. Elliott also plans to push Match to take steps to boost its languishing stock price, the Journal reported, citing people familiar with the matter. However, it could not learn of Elliott’s specific demands. “Our team regularly engages with investors, and will continue to work to create great experiences for our users and value for our shareholders”, a Matc…