Steps to reproduce:
1. Open user attached project and "myscene"
2. Press Play and observe information in console
3. Switch graphics API from Metal to Open GL and vice versa
4. Press Play and observe information again

Expected outcome: On Metal API the 0,0 coordinate should be at the top-left. On OpenGL - bottom-left, resulting in the last statement being True for Metal API and False for OpenGL.
Actual outcome: Both API's ReadPixels() method returns bottom-left (0,0) coordinate. Last statement is false in both occasions

Reproduced on Unity 5.6.0f1, 5.6.0f3, 2017.1.0b1

Also repro'd on iPhone 6 + iOS 8.0

Notes: Couldn't test for regression, 5.5.x editor returns OpenGL API no matter the setting.