German World Cup winner Jérôme Boateng is joining Linzer ASK from relegated Serie A side Salernitana, the Austrian top flight club said on Friday. Boateng, 35, has signed a two-year contract until 2026 at LASK who “ame third in the Austrian Bundesliga. ‘It’s absolutely amazing and unbelievable that we were able to bring such an internationally sought-after exceptional player to LASK in Jérôme Boateng,” club boss Siegmund Gruber said. Centre back Boateng joined Salernitana in January after several months out of contract following a two-year spell at Ligue 1 side Olympique Lyon. The 2014 World C…