added include guards to hlsl codegen

Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Lighting/LightDefinition.cs.hlsl

 // This file was automatically generated from Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Lighting/LightDefinition.cs.  Please don't edit by hand.
 //
 
+#ifndef LIGHTDEFINITION_CS_HLSL
+#define LIGHTDEFINITION_CS_HLSL
 //
 // UnityEngine.Experimental.ScriptableRenderLoop.LightFlags:  static fields
 //
 }
 
 
+#endif

Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Lighting/ShadowDefinition.cs.hlsl

 // This file was automatically generated from Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Lighting/ShadowDefinition.cs.  Please don't edit by hand.
 //
 
+#ifndef SHADOWDEFINITION_CS_HLSL
+#define SHADOWDEFINITION_CS_HLSL
 //
 // UnityEngine.Experimental.ScriptableRenderLoop.ShadowType:  static fields
 //
 {
 	float4x4 worldToShadow;
 	int shadowType;
-	float3 unused;
+	float bias;
+	float2 unused;
 };
 
 //
 {
 	return value.shadowType;
 }
-float3 GetUnused(PunctualShadowData value)
+float GetBias(PunctualShadowData value)
+{
+	return value.bias;
+}
+float2 GetUnused(PunctualShadowData value)
+#endif

Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Material/Builtin/BuiltinData.cs.hlsl

 // This file was automatically generated from Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Material/Builtin/BuiltinData.cs.  Please don't edit by hand.
 //
 
+#ifndef BUILTINDATA_CS_HLSL
+#define BUILTINDATA_CS_HLSL
 //
 // UnityEngine.Experimental.ScriptableRenderLoop.Builtin.BuiltinData:  static fields
 //
 };
 
 
+#endif

Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Material/Lit/Lit.cs.hlsl

 // This file was automatically generated from Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Material/Lit/Lit.cs.  Please don't edit by hand.
 //
 
+#ifndef LIT_CS_HLSL
+#define LIT_CS_HLSL
 //
 // UnityEngine.Experimental.ScriptableRenderLoop.Lit.MaterialId:  static fields
 //
 };
 
 
+#endif

Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Material/Unlit/Unlit.cs.hlsl

 // This file was automatically generated from Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Material/Unlit/Unlit.cs.  Please don't edit by hand.
 //
 
+#ifndef UNLIT_CS_HLSL
+#define UNLIT_CS_HLSL
 //
 // UnityEngine.Experimental.ScriptableRenderLoop.Unlit.SurfaceData:  static fields
 //
 };
 
 
+#endif

Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/ShaderPass/ShaderPass.cs.hlsl

 // This file was automatically generated from Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/ShaderPass/ShaderPass.cs.  Please don't edit by hand.
 //
 
+#ifndef SHADERPASS_CS_HLSL
+#define SHADERPASS_CS_HLSL
 //
 // UnityEngine.Experimental.ScriptableRenderLoop.ShaderPass:  static fields
 //
 #define SHADERPASS_DEBUG_VIEW_MATERIAL (7)
 
 
+#endif

Assets/ScriptableRenderLoop/fptl/LightDefinitions.cs.hlsl

-#ifndef SOMETHINGSOMETHING
-#define SOMETHINGSOMETHING
-
+#ifndef LIGHTDEFINITIONS_CS_HLSL
+#define LIGHTDEFINITIONS_CS_HLSL
 //
 // LightDefinitions:  static fields
 //
 }
 
 
-#endif
+#endif

Assets/ShaderGenerator/CSharpToHLSL.cs

 
                 using (var writer = File.CreateText(fileName))
                 {
+                    var guard = Path.GetFileName(fileName).Replace(".", "_").ToUpper();
+                    if (!char.IsLetter(guard[0]))
+                        guard = "_" + guard;
+
+                    writer.Write("#ifndef " + guard + "\n");
+                    writer.Write("#define " + guard + "\n");
 
                     foreach (var gen in it.Value)
                     {
                         }
                     }
 
-                    writer.Write("\n");
+                    writer.Write("\n#endif\n");
                 }
             }
         }

Assets/ScriptableRenderLoop/fptl/LightingConvexHullUtils.hlsl.meta

+fileFormatVersion: 2
+guid: 97c18f9b04997a34aa7a246dbc1b2fac
+timeCreated: 1477394758
+licenseType: Pro
+ShaderImporter:
+  defaultTextures: []
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/ScriptableRenderLoop/fptl/lightlistbuild-bigtile.compute.meta

+fileFormatVersion: 2
+guid: b5507a2ffdae8a84f94211c10d428920
+timeCreated: 1477394781
+licenseType: Pro
+ComputeShaderImporter:
+  currentAPIMask: 4
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: