Added pragma on GPUCopy compute shader

ScriptableRenderPipeline/Core/CoreRP/CoreResources/GPUCopy.compute

 // Autogenerated file. Do not edit by hand
 
+#pragma only_renderers d3d11 ps4 xboxone vulkan metal
 #include "../ShaderLibrary/Common.hlsl"
 
 CBUFFER_START (UnityCBuffer)

ScriptableRenderPipeline/Core/CoreRP/CoreResources/GPUCopyAsset.cs

             // Compute Shader
             cc.AppendLine(@"// Autogenerated file. Do not edit by hand");
             cc.AppendLine();
+            cc.AppendLine("#pragma only_renderers d3d11 ps4 xboxone vulkan metal");
             cc.AppendLine(@"#include ""../ShaderLibrary/Common.hlsl""");
             cc.AppendLine(ccp.ToString()); // Properties
             cc.AppendLine(cck.ToString()); // Kernels