Base class for implementing sysroots and toolchains for IL2CPP
| HostArch | Returns name of the host architecture | 
| HostPlatform | Returns name of the host platform | 
| Name | Returns name of the sysroot | 
| TargetArch | Returns name of the target architecture | 
| TargetPlatform | Returns name of the target platform | 
| GetIl2CppArguments | Returns the next Il2Cpp argument on each call | 
| Initialize | Initializes sysroot |