Taiwan-based Pegatron Technologies has been tapped as a second manufacturing partner for the next-generation iPhone and will begin shipping units next month, according to a new report. Citing industry sources, DigiTimes reports that Apple has ordered 10 million “iPhone 5” units from Pegatron, with shipments to begin in September. The report goes on to state that Pegatron is aiming to complete orders for iPads, MacBook Airs, and other Apple…