Mark both NuPkgs as "NonShipping=true"

Author: jbeisner

build/publish/PublishNupkgToBlobFeed.targets

@@ -5,7 +5,9 @@
     <ItemGroup>
       <NupkgsForPublishing Include="$(PackagesDirectory)/Microsoft.DotNet.Cli.Utils.*.nupkg"
                            Exclude="$(PackagesDirectory)/*.symbols.nupkg"
-                           Condition=" '$(OS)' == 'Windows_NT' And '$(Architecture)' == 'x64' " />
+                           Condition=" '$(OS)' == 'Windows_NT' And '$(Architecture)' == 'x64' " >
+        <ManifestArtifactData>NonShipping=true</ManifestArtifactData>
+      </NupkgsForPublishing>
       <NupkgsForPublishing Include="$(PackagesDirectory)/Microsoft.DotNet.MSBuildSdkResolver.*.nupkg"
                            Exclude="$(PackagesDirectory)/*.symbols.nupkg"
                            Condition=" '$(OS)' == 'Windows_NT' And '$(Architecture)' == 'x64' " >