[build] Maybe this only works with some xamarin.mac releases

Generate the app bundle path in a more manual way

Author: alanmcgovern

Xamarin.PropertyEditing.Mac.Standalone/Xamarin.PropertyEditing.Mac.Standalone.csproj

@@ -123,7 +123,7 @@
     </ItemGroup>
     <Copy 
       SourceFiles="@(PropertyEditingResourceBundlePath)" 
-      DestinationFiles="@(PropertyEditingResourceBundlePath->'$(AppBundleDir)\Contents\MonoBundle\PropertyEditingResource.bundle\%(RecursiveDir)%(Filename)%(Extension)')"
+      DestinationFiles="@(PropertyEditingResourceBundlePath->'$(OutputPath)\$(AssemblyName).app\Contents\MonoBundle\PropertyEditingResource.bundle\%(RecursiveDir)%(Filename)%(Extension)')"
       SkipUnchangedFiles="true" 
       OverwriteReadOnlyFiles="true" 
       Retries="3"