Elon Musk said on Thursday he has found a new chief executive for Twitter without naming the person and that he will transition to the role of chief technology officer of the social media platform within the next few weeks. “Excited to announce that I’ve hired a new CEO for X/Twitter. She will be starting in ~6 weeks!,” Musk said in a tweet. The Wall StreetJournal first reported that Comcast NBCUniversal executive Linda Yaccarino was in talks for the job. Word came Thursday that Yaccarino will leave NBC following the reports. Musk has previously not named any prospective candidates, and…