Steps to reproduce:
1. Open the attached project
2. Build Windows player
3. Observe build errors:
Assets\Plugins\PluginTests.cs(11,51): error CS0433: The type 'TestClass' exists in both 'AssemblyFor_UUM_69382.Win32, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' and 'AssemblyFor_UUM_69382.Win64, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'