Target is offering a $50 discount on both the iPhone 4 and iPhone 4S, according to a new report. Citing email tips, 9to5Mac reports that a number of Target locations are offering a deal on the iPhone 4S and iPhone 4, with the prices of 16GB and 8GB units respectively cut to $150 and $50 on a two year contract, regardless of carrier. It is unclear whether more capacious models are also included, and the deal does not appear to be available online.…