Fixed PS4 compiler error.

ScriptableRenderPipeline/LightweightPipeline/Shaders/LightweightInput.cginc

 CBUFFER_END
 
 CBUFFER_START(_PerCamera)
-sampler2D _MainLightCookie;
 float4 _MainLightPosition;
 half4 _MainLightColor;
 half4 _MainLightDistanceAttenuation;
 half4 _AdditionalLightSpotDir[MAX_VISIBLE_LIGHTS];
 half4 _AdditionalLightSpotAttenuation[MAX_VISIBLE_LIGHTS];
 CBUFFER_END
+
+sampler2D _MainLightCookie;
 
 // These are set internally by the engine upon request by RendererConfiguration.
 // Check GetRendererSettings in LightweightPipeline.cs