Modification to stop the UWP project producing a build error due to the lack of Microsoft.Bcl.Build.

Author: davidbritch

src/Mobile/eShopOnContainers/eShopOnContainers.Windows/eShopOnContainers.Windows.csproj

@@ -18,6 +18,7 @@
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <PackageCertificateKeyFile>Windows_TemporaryKey.pfx</PackageCertificateKeyFile>
+    <SkipValidatePackageReferences>true</SkipValidatePackageReferences>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|ARM'">
     <DebugSymbols>true</DebugSymbols>
@@ -183,4 +184,4 @@
     <VisualStudioVersion>14.0</VisualStudioVersion>
   </PropertyGroup>
   <Import Project="$(MSBuildExtensionsPath)\Microsoft\WindowsXaml\v$(VisualStudioVersion)\Microsoft.Windows.UI.Xaml.CSharp.targets" />
-</Project>
+</Project>