By John Chalmers BRUSSELS (Reuters) -The European Union’s internal market chief said on Tuesday that Elon Musk could adapt Twitter as he wishes after he acquires the social media site but warned the billionaire that the bloc has strict rules for online platforms to tackle illegal content. “It will be up to Twitter to adapt themselves … to our rules,” Thierry Breton told Reuters and one other media outlet on the deal sealed on Monday by Tesla’s chief executive to buy Twitter for $44 billion. “I think Elon Musk knows Europe very well. He knows very well that we have some rules for the automoti…