fix chaos of Layer and extension

inc/hgl/graph/VKDevice.h

@@ -84,6 +84,14 @@ public:
                     return Resize(extent);
                 }
 
+public: //
+
+    template<typename T>
+    T *GetProc(const char *name)
+    {
+        return reinterpret_cast<T>(vkGetDeviceProcAddr(attr->device,name));
+    }
+
 public: //内存相关
 
     GPUMemory *CreateMemory(const VkMemoryRequirements &,const uint32_t properties);