Add SHA-256 for 15A284 InstallESD.
Add SHA-256 for 15A284 InstallESD.

drduh/macOS-Security-and-Privacy-Guide,DeadLion/macOS-Security-and-Privacy-Guide,ScheerMT/OS-X-Yosemite-Security-and-Privacy-Guide,drduh/OS-X-Security-and-Privacy-Guide,drduh/OS-X-Yosemite-Security-and-Privacy-Guide