Build Microsoft.Windows.Compatibility package in next 2.2 servicing release.

Author: StephenBonikowsky

src/packages.builds

@@ -35,6 +35,9 @@
     <Project Include="$(MSBuildThisFileDirectory)System.Data.SqlClient\pkg\System.Data.SqlClient.pkgproj">
       <AdditionalProperties>$(AdditionalProperties)</AdditionalProperties>
     </Project>
+    <Project Include="$(MSBuildThisFileDirectory)..\pkg\Microsoft.Windows.Compatibility\Microsoft.Windows.Compatibility.builds">
+      <AdditionalProperties>$(AdditionalProperties)</AdditionalProperties>
+    </Project>
   </ItemGroup>
 
   <!-- Need the PackageIndexFile file property from baseline.props -->