Merge pull request #21 from unity/switch-iphone-arch-to-universal

Switching the iPhone architecture setting to Universal.

ProjectSettings/ProjectSettings.asset

     26: UNITY_POST_PROCESSING_STACK_V2
     27: UNITY_POST_PROCESSING_STACK_V2
   platformArchitecture:
-    iPhone: 1
+    iPhone: 2
   scriptingBackend: {}
   il2cppCompilerConfiguration: {}
   managedStrippingLevel: {}