Manager: Use prebuilt toybox

[SakuraKyuo]

• workarounds boot patch issue on some ROMs which using 4.x kernel

[marat2509]

Are there any test results of this solution on devices where the boot patch failed with the built-in toybox?

[SakuraKyuo]

Are there any test results of this solution on devices where the boot patch failed with the built-in toybox?

It has been tested on the devices which got boot patch failed, and the result is a successful patch. This commit mainly solves the problem that grep in the toybox of devices which using 4.x kernel cannot obtain the kernel configuration due to the lack of necessary argments and the patch script is forced to end.