Borussia Dortmund are closing in on another summer signing with talks on Germany striker Karim Adeyemi on the “home straight,” according to his agent. “We are in very good talks with Dortmund and are entering the home straight,” agent Thomas Solomon told the Sport1 portal Tuesday. Adeyemi is under contract at Austrian champions Salzburg on a deal until 2024 but both clubs reportedly have reached an agreement and the 20-year-old is to be signed by the second-placed Bundesliga club until 2027. Dortmund chief executive Hans-Joachim Watzke had on the weekend reiterated their big interest in Adeyem…