Merge pull request #430 from NikolaMilosavljevic/sign.wixpack

Update wixpack path

Author: NikolaMilosavljevic

eng/Signing.props

@@ -6,7 +6,7 @@
 
   <ItemGroup Condition="'$(RID)' == 'win-x86'">
     <FileExtensionSignInfo Include=".wixpdb" CertificateName="MicrosoftDotNet500" />
-    <ItemsToSign Include="$(ArtifactsShippingPackagesDir)**\*.wixpack.zip;
+    <ItemsToSign Include="$(ArtifactsNonShippingPackagesDir)**\*.wixpack.zip;
       $(ArtifactsDir)packages\**\dotnet-core-uninstall*.msi" />
   </ItemGroup>