Hillary Clinton and “Iron Lady” Oscar winner Meryl Streep bonded over a private dinner at the actress’ TriBeCa apartment Saturday night. Witnesses said the lobby was swarmed with Secret Service officers as the secretary of state headed up to Streep’s penthouse. Earlier in the evening, the pair had shared the stage at the Women in the World Summit at Lincoln Center. Streep — who whipped out her latest Oscar and said, “This is what you get when you play a world leader” — introduced Clinton, who in turn quipped she was relieved that Streep “didn’t do a movie called ‘The Devil Wears Pantsuits’ ” before moving onto more serious matters, urging women to be “fearless” and “audacious.”