Apple plans to ship 25 million next-generation iPhones by the end of this year, according to a new report. Citing people within Apple’s component suppliers, the Wall Street Journal reports that the new iPhone is expected to be thinner and lighter than the iPhone 4, with an eight-megapixel camera, and Qualcomm wireless baseband chips. “Apple’s sales estimates of the new iPhone is quite aggressive. It told us to prepare to help the…