Add const to layout parameter in creation params

Author: kevyuu

include/nbl/video/IGPUComputePipeline.h

@@ -74,7 +74,7 @@ class IGPUComputePipeline : public IGPUPipeline<asset::IComputePipeline<const IG
                 return {};
             }
 
-            IGPUPipelineLayout* layout = nullptr;
+            const IGPUPipelineLayout* layout = nullptr;
             // TODO: Could guess the required flags from SPIR-V introspection of declared caps
             core::bitflag<FLAGS> flags = FLAGS::NONE;
             SCachedCreationParams cached = {};

include/nbl/video/IGPUGraphicsPipeline.h

@@ -87,7 +87,7 @@ class IGPUGraphicsPipeline : public IGPUPipeline<asset::IGraphicsPipeline<const
                 return stages;
             }
 
-            IGPUPipelineLayout* layout = nullptr;
+            const IGPUPipelineLayout* layout = nullptr;
             SShaderSpecInfo vertexShader;
             SShaderSpecInfo tesselationControlShader;
             SShaderSpecInfo tesselationEvaluationShader;

include/nbl/video/IGPURayTracingPipeline.h

@@ -41,7 +41,7 @@ class IGPURayTracingPipeline :  public IGPUPipeline<asset::IRayTracingPipeline<c
 
             };
 
-            IGPUPipelineLayout* layout = nullptr;
+            const IGPUPipelineLayout* layout = nullptr;
             SShaderGroupsParams shaderGroups;
 
             SCachedCreationParams cached = {};