Merge pull request #263 from Unity-Technologies/Branch_FixPS4ShaderCompile

Fixed shader compilation on PS4

Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl

     bsdfData.specularOcclusion = inGBuffer0.a;
 
 #ifdef USE_NORMAL_TETRAHEDRON_ENCODING
-    uint faceIndex;
+    int faceIndex;
-    uint octNormalSign;
+    int octNormalSign;
     UnpackFloatInt10bit(inGBuffer1.b, 4.0, bsdfData.perceptualRoughness, octNormalSign);
     inGBuffer1.r *= (octNormalSign & 1) ? 1.0 : -1.0;
     inGBuffer1.g *= (octNormalSign & 2) ? 1.0 : -1.0;