The man who killed Osama bin Laden had a special gift for the brilliant CIA analyst who found the 9/11 mastermind. Robert O’Neill knew he had to give the “badass” woman who worked doggedly for years to find bin Laden a token to celebrate the completion of her life’s mission when he met her at the base at Jalalabad in Afghanistan following the May 2, 2011 raid. Robert O’Neill gave the CIA analyst who found bin Laden his magazine with the rounds still in it. Courtesy of Rob O'Neill “I pulled out the magazine from my gun that I used to kill bin Laden, with the remaining 27 rounds in it, walked up to her and asked do you have room for this in your backpack? She said ‘I think I do,’ ” he told The Post. O’Neill described the analyst, who was famously portrayed by Jessica Chastain in the Oscar-winning Zero Dark Thirty , as a “no-nonsense” professional, anxious to finally deliver justice to the man with the blood of more than 3,000 Americans on his hands. He promised her he’d never reveal her identity, he said.…