Add shared runtime items in a target (#4297)

Author: pakrym

src/Installers/RuntimeSiteExtension/Microsoft.AspNetCore.Runtime.SiteExtension.pkgproj

@@ -19,8 +19,6 @@
     <Content Include="scmApplicationHost.xdt" />
     <Content Include="install.cmd" />
     <Content Include="..\..\SiteExtensions\src\Microsoft.Web.Xdt.Extensions\bin\$(Configuration)\net461\Microsoft.Web.Xdt.Extensions.dll" PackagePath="content" />
-
-    <Content Include="$(DotNetUnpackFolder)\**\*.*" Condition="$(DotNetAssetRootUrl) != ''" PackagePath="content\%(RecursiveDir)" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(SharedFxArchitecture)' == 'x86'">
@@ -40,6 +38,12 @@
     <PackageReference Include="Microsoft.AspNetCore.AspNetCoreModuleV2" Version="$(PackageVersion)" />
   </ItemGroup>
 
+  <Target Name="ResolveReferenceItemsForPackage" DependsOnTargets="ResolveReferences" BeforeTargets="_GetPackageFiles">
+    <ItemGroup>
+      <Content Include="$(DotNetUnpackFolder)\**\*.*" Condition="$(DotNetAssetRootUrl) != ''" PackagePath="content\%(RecursiveDir)" />
+    </ItemGroup>
+  </Target>
+
   <Target Name="CopyFilesToOutputDirectory" />
   <Target Name="CoreCompile" />
   <Target Name="CreateManifestResourceNames" />