How To Ignore Mismatch Processor Architecture Warnings In Unit Test Assemblies With Faked Assemblies

I was attempting to cleanup the warnings in our solution build and ran into this one:

There was a mismatch between the processor architecture of the project being built "MSIL" and the processor architecture of the reference "Microsoft.TeamFoundation.WorkItemTracking.Client.DataStoreLoader", "x86". This mismatch may cause runtime failures. Please consider changing the targeted processor architecture of your project through the Configuration Manager so as to align the processor architectures between your project and references, or take a dependency on references with a processor architecture that matches the targeted processor architecture of your project. [C:\_Dev\Current Sprint\Xrm.Common.Tests\obj\Debug\Fakes\xrmt\f.csproj]    Xrm.Common.Tests

Researching the error on the web I found that I should be able to use the ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch Project property to ignore the warning.  I added the property to my Unit Test project and it didn't do anything.  After searching for another 20 minutes I ended up re-reading the warning, and noticed that it was referencing a csproj file other than the one that VS was showing as containing the warning. 
A couple more tests and I finally found that you can include MSBuild properties in the Fakes csproj by using the Compilation Element:

<Fakes xmlns="http://schemas.microsoft.com/fakes/2011/">
  <Assembly Name="Xrm.Common"/>
  <Compilation>
    <Property Name="ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch">None</Property>
  </Compilation>
</Fakes>

Problem Solved!

Now on to clearing out the rest of the warnings...