Backflow from https://github.com/dotnet/dotnet / 30bc8f9 build 278224

[[ commit created by automation ]]

Author: dotnet-maestro[bot]

src/Layout/pkg/windows/bundles/sdk/bundle.wixproj

@@ -40,7 +40,7 @@
       <DefineConstants>$(DefineConstants);MinimumVSVersion=$(MinimumVSVersion)</DefineConstants>
 
       <!-- PlatformToken is used to generate a generate a WiX variable name using a preprocessor variable so casing matters. -->
-      <DefineConstants>$(DefineConstants);PlatformToken=$(InstallerPlatform.ToUpper())</DefineConstants>
+      <DefineConstants>$(DefineConstants);PlatformToken=$(TargetArchitecture.ToUpper())</DefineConstants>
 
       <!-- Source paths for packages to chain. -->
       <DefineConstants>$(DefineConstants);FinalizerExeSourceFile=$(FinalizerExeSourceFile)</DefineConstants>