The default behavior of dotnet sdk for ref assembly is changed from 6.0.200
Change-Id: Ia72c8d2899fbbe60f2ea3b07d389bb3b09a399a5
<EnableDefaultItems>false</EnableDefaultItems>
<GenerateDocumentationFile>true</GenerateDocumentationFile>
<ProduceReferenceAssembly>True</ProduceReferenceAssembly>
+ <ProduceReferenceAssemblyInOutDir>true</ProduceReferenceAssemblyInOutDir>
<DefineConstants>TIZEN;OPENGLES;SDL2;__MOBILE__</DefineConstants>
<NoWarn>$(NoWarn);CS3021</NoWarn>
</PropertyGroup>