Apple supplier AU Optronics is guiding the production of a Retina display for the second-generation iPad mini, according to a new report. In an item translated from a Chinese tech website, the new iPad mini is reported to have the widely-expected iPad-matching resolution of 2048 x 1536 pixels, which translates at 7.9” to a pixel density of 324 ppi. The report is further confirmation of everything we’ve been hearing, with all signs pointing…