Reproduction steps:
1. Open attached project
2. Open "Test" scene

Expected result: "LightBounceTest" object has texture
Actual result: "LightBounceTest" object is black

This is caused by Occlusion UVs not being generated from surface shader
To work arround, uncomment line 33 in BrokenUVs.shader file. If Occlusion map is used in Albedo, then it is generated properly.

Tested and reproduced on Unity 5.2.5f1, 5.3.4f1, 5.4.2f2
Not reproducible on: Unity 5.5.0b9, 5.6.0a1