Angelina Jolie made a secret visit to an orphanage in Ukraine as part of a whistle-stop trip to the war-torn nation.The Hollywood star, 46, kept her journey under wraps, with members of her entourage reportedly signing deals banning them from revealing any details.Local officials had no knowledge of her visit to the orphanage at an undisclosed location around 90 minutes’ drive from the western city of Lviv.