* Jared Kushner an ally of Saudi prince who led Qatar boycott. : LONDON/NEW YORK/DUBAI (Reuters) - When news emerged that Qatar may have unwittingly helped bail out a New York skyscraper owned by the family of Jared Kushner, Donald Trump’s son-in-law, eyebrows were raised in Doha. Kushner, a senior White House adviser, was a close ally of Saudi Crown Prince Mohammed bin Salman - a key architect of a regional boycott against Qatar, which Riyadh accuses of sponsoring terrorism. Doha denies the charge.