A pilot hired by FedEx has been sentenced to four weeks in jail in Singapore, after he breached a stay-at-home order by leaving his hotel room and travelling downtown to buy face masks and a thermometer.Brian Dugan Yeargan, an American, had reportedly been served the order on April 3 after arriving in Singapore from Australia.Under the stay order, Yeargan – who was also issued a 30-day short-term visit pass – was not allowed to leave his hotel room at the Crowne Plaza Changi Airport hotel…