Fix up some test options

Our Test.cmd script and Microbuild test running got messed up during the
recent SDK change.  A series of conflicts were just merged incorrectly.

build/scripts/build.ps1

@@ -40,7 +40,7 @@ function Run-Build() {
 
 function Run-Test() {
     $proj = Join-Path $repoDir "BuildAndTest.proj"
-    $args = "/v:m /p:SkipCoreClr=true /p:ManualTest=true /t:Test $proj"
+    $args = "/v:m /p:SkipCoreClr=true /p:ManualTest=true /t:Test /p:Test32=true $proj"
     if ($test64) { 
         $args += " /p:Test64=true"
     }

src/Tools/MicroBuild/Build.proj

@@ -38,7 +38,7 @@
     <MSBuild Projects="$(RepoRoot)src\NuGet\NuGet.proj" />
     <MSBuild Projects="$(RepoRoot)src\Setup\SetupStep2.proj" Properties="$(SetupStep2Properties);DeployExtension=false" />
 
-    <MSBuild Projects="$(RepoRoot)BuildAndTest.proj" Targets="Test" Condition="'$(SkipTest)' != 'true'" Properties="SkipCoreClrTests=true" />
+    <MSBuild Projects="$(RepoRoot)BuildAndTest.proj" Targets="Test" Condition="'$(SkipTest)' != 'true'" Properties="Test32=true" />
 
     <Exec Command="powershell -noprofile -executionPolicy ByPass -file $(MSBuildThisFileDirectory)..\..\..\build\scripts\check-toolset-insertion.ps1 &quot;$(MSBuildThisFileDirectory)..\..\..&quot; &quot;$(BinariesPath)&quot;" />