A bunch of long Errors appear when trying to build the project using IL2CPP.

Steps to reproduce:
1. Open User's attached project (uploaded to ownCloud)
2. Switch platform to iOS or Android
3. Open Player Settings and make sure that Scripting Backend is set to IL2CPP
4. Build the project

Result:
Errors appear in the Console:
1. Failed running [...] -l none -c link -b true -x [...]
2. Exception: /Applications/Unity56b11/Unity.app/Contents/Tools/UnusedByteCodeStripper2/UnusedBytecodeStripper2.exe did not run properly!

Reproduced with: 2017.1.0a4, 5.6.0f1, 5.5.2p3
Not reproduced with: 5.4.5f1 (due to Errors in the Console)

Note: reproduced with both iOS and Android.