dnn: support later IE versions

modules/dnn/src/op_inf_engine.cpp

@@ -192,6 +192,10 @@ void InfEngineBackendNet::getName(char*, size_t) noexcept
 {
 }
 
+void InfEngineBackendNet::getName(char*, size_t) const noexcept
+{
+}
+
 size_t InfEngineBackendNet::layerCount() noexcept
 {
     return layers.size();

modules/dnn/src/op_inf_engine.hpp

@@ -46,7 +46,9 @@ public:
 
     virtual InferenceEngine::InputInfo::Ptr getInput(const std::string &inputName) noexcept CV_OVERRIDE;
 
-    virtual void getName(char *pName, size_t len) noexcept CV_OVERRIDE;
+    virtual void getName(char *pName, size_t len) noexcept;
+
+    virtual void getName(char *pName, size_t len) const noexcept;
 
     virtual size_t layerCount() noexcept CV_OVERRIDE;