Merge pull request #356 from Unity-Technologies/Branch_FixCrashDebugPS4

Removed lighting computation from forward pass when doing debug. This caused crashes on PS4 due to uninitialized buffers.

Assets/ScriptableRenderPipeline/HDRenderPipeline/ShaderPass/ShaderPassForward.hlsl

 
     PreLightData preLightData = GetPreLightData(V, posInput, bsdfData);
 
+// We need to skip lighting when doing debug pass because the debug pass is done before lighting so some buffers may not be properly initialized potentially causing crashes on PS4.
+#ifndef DEBUG_DISPLAY
     uint featureFlags = 0xFFFFFFFF;
     float3 diffuseLighting;
     float3 specularLighting;
     outColor = float4(diffuseLighting + specularLighting, builtinData.opacity);
+#endif
 
 #ifdef _DEPTHOFFSET_ON
     outputDepth = posInput.depthRaw;