Reproduction steps:
1. Create a new project.
2. Build Unity project to tvOS.
3. Try to build Xcode project.
- Project will not build:
Illegal redeclaration of property in class extension 'CADisplayLink' (attribute must be 'readwrite', while its primary must be 'readonly')
Illegal redeclaration of property in class extension 'UIScreen' (attribute must be 'readwrite', while its primary must be 'readonly')

Reproduced with:
tvOS Device, tvOS Simulator
2018.1.0a1, 2017.3.0b1, 2017.3.0a7

Not reproducible with:
2017.2.0f2

Regression introduced in:
2017.3