Apple is now the fifth-largest cellphone maker in China, according to a report in the Wall Street Journal based on numbers from analyst firm IDC. The iPhone maker leapt a full percentage point in the last quarter of 2013 on the strength of its iPhone 5s and 5c, and the report does not even include sales from China Mobile, with which Apple finally inked a deal in December. The surge in sales moved the iPhone into a seven percent share of the smartphone market….