Turn off ngen for Microsoft.CodeAnalysis.Workspaces.MSBuild

The number of users this could help is very, very tiny, and the number
of ways it could cause further problems is much, much higher.

Author: jasonmalinowski

src/VisualStudio/Setup/Roslyn.VisualStudio.Setup.csproj

@@ -173,6 +173,12 @@
       <ForceIncludeInVSIX>true</ForceIncludeInVSIX>
       <AdditionalProperties>TargetFramework=net472</AdditionalProperties>
       <PkgDefEntry>BindingRedirect</PkgDefEntry>
+
+      <!-- Disable ngen. If we don't set this, ngen is enabled for all binaries coming from this ProjectReference, which includes the build hosts coming in as content.
+           That doesn't make sense to do for the .NET Core build host (since ngen isn't supported there), and without extra configuation to specify the correct set
+           of binding redirects, it probably won't be useful for the .NET Framework one in practice. Customer use of MSBuildWorkspace inside Visual Studio is rare as it is;
+           so while we could try to do a bunch of extra MSBuild trickery to get the right ngen attributes to the right binaries, it's just far easier to turn it off. -->
+      <Ngen>false</Ngen>
     </ProjectReference>
     <ProjectReference Include="..\..\Workspaces\CSharp\Portable\Microsoft.CodeAnalysis.CSharp.Workspaces.csproj">
       <Name>CSharpWorkspace</Name>