升级 Opencore 0.7.7

[icyleaf]

太久没升级了，升级一次好麻烦。

升级备注：

• https://www.tonymacx86.com/threads/how-to-opencore-0-7-1-0-7-2-differences.314916/
• https://www.tonymacx86.com/threads/how-to-opencore-0-7-2-0-7-3-differences.315596/
• https://www.tonymacx86.com/threads/how-to-opencore-0-7-3-0-7-4-differences.316107/
• https://www.tonymacx86.com/threads/how-to-opencore-0-7-4-0-7-5-differences.316791/
• https://www.tonymacx86.com/threads/how-to-opencore-0-7-5-0-7-6-differences.317595/
• https://www.tonymacx86.com/threads/how-to-opencore-0-7-6-0-7-7-differences.318264