gistfile1.xml

<ItemGroup>
    <!-- Specify the folder, or files we want to include -->
    <AdditionalPublishFiles Include="ListAndLabel\*.*">
        <Visible>False</Visible>
    </AdditionalPublishFiles>

    <!-- Alternative syntax, for individual files -->
    <!--
    <AdditionalPublishFiles Include="ListAndLabel\cmbr15.dll;ListAndLabel\Cmct15.dll">
        <Visible>False</Visible>
    </AdditionalPublishFiles>
    -->
</ItemGroup>

<Target Name="BeforeBuild">
    <!-- Copies the files to the output folder -->
    <Copy DestinationFolder="$(OutputPath)"
          SourceFiles="@(AdditionalPublishFiles)"
          SkipUnchangedFiles="false" />
          
    <!-- Creates a PublishItem for each file in the AdditionalPublishFiles Include -->
    <CreateItem Include="@(AdditionalPublishFiles)"
                AdditionalMetadata="TargetPath=%(FileName)%(Extension);IsDataFile=false">
        <!-- Sets the parameter to 'Include' for each item in the _DeploymentManifestFiles -->
        <Output TaskParameter="Include"
                ItemName="_DeploymentManifestFiles" />
    </CreateItem>
</Target>