Merge pull request #15869 from TolyaTalamanov:at/plaidml-backend

G-API: Implement PlaidML2 backend

* PlaidML backend init version

* Add test

* Support multiply inputs/outputs in PlaidML2 backend

* Fix comment to review

* Add HAVE_PLAIDML macros

* Move plaidml tests to separate file

* Fix comment to review

* Fix cmake warning

* Fix comments to review

* Fix typos

overload -> overflow

* Fix comments to review

* Clean up

* Remove spaces from cmake scripts
* Disable tests with bitwise operations

* Use plaidml::exec::Binder

modules/gapi/src/executor/gexecutor.cpp

@@ -62,7 +62,8 @@ cv::gimpl::GExecutor::GExecutor(std::unique_ptr<ade::Graph> &&g_model)
 
                 m_ops.emplace_back(OpDesc{ std::move(input_rcs)
                                          , std::move(output_rcs)
-                                         , m_gim.metadata(nh).get<IslandExec>().object});
+                                         , m_gim.metadata(nh).get<IslandExec>().object
+                                         });
             }
             break;