BlackBerry Ltd. is undergoing another round of job cuts as part of a wider restructure as it tries to offset weak smartphone sales. The Waterloo, Ontario based company declined on Tuesday to disclose how many employees were affected in the latest change, but said that some were shifted to different roles while others were laid off. BlackBerry has shed thousands of jobs since it began restructuring its operations under chief executive, John Chen, who joined the company in 2013 and has focused on