Reproduction steps:
1. Open and build the attached project to an iOS device.

Actual result:
- Xcode build will fail(IL2CPP):
Classes/Native/Bulk_System.Configuration_0.cpp:23229:85: No member named 'Configuration' in namespace 'il2cpp::icalls::System'

Using mono:
Undefined symbols for architecture armv7:
"_OBJC_CLASS_$_ADClient", referenced from:
objc-class-ref in libKochavaUnitySupport.a(KochavaRetrieveiAdAttribution.o)
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Reproduced with:
- 2017.2.1p2
- 2017.3.0p2

Notes:
- 2017.1.3f1 - Build fails with error message - UnityLinker.exe did not run properly!
- 2018.1.0b4 - Unity build fails with unrelated error messages.
- Command line or automation server is not required to reproduce this issue.