Qatar’s emir met the de facto ruler of the United Arab Emirates during an official event at the Beijing Winter Olympics, in the first such interaction between the two Gulf leaders since four Arab states agreed to end a dispute with Doha over a year ago. Emir Sheikh Tamim bin Hamad al-Thani met Abu Dhabi Crown Prince Sheikh Mohammed bin Zayed al-Nahyan on the sidelines of a lunch hosted by China’s president on Saturday, Qatar’s state news agency said. UAE news websites published a video clip of the two leaders speaking. Abu Dhabi has yet to restore diplomatic ties with Doha since Saudi Arabia,t…