Intel Corp. gave a stronger-than-anticipated revenue forecast for the current period, offering investors a glimmer of hope as they wait for a turnaround under new Chief Executive Officer Lip-Bu Tan. Third-quarter sales will be $12.6 billion to $13.6 billion, the company said in a statement Thursday. Analysts on average had projected a number at the low end of that range. Intel is benefiting from a resurgence in the personal-computer industry, driven in part by manufacturers’ efforts to build up