Don't R2R when explicitly requested not to

Author: jkoritzinsky

src/Framework/App.Runtime/src/Microsoft.AspNetCore.App.Runtime.Composite.sfxproj

@@ -18,6 +18,8 @@
     <!-- VMR doesn't produce valid crossgen for the host/build machine https://github.com/dotnet/source-build/issues/3793 -->
     <PublishReadyToRun Condition=" '$(DotNetBuild)' == 'true' AND '$(Crossbuild)' == 'true' ">false</PublishReadyToRun>
     <PublishReadyToRun Condition=" '$(PublishReadyToRun)' == '' AND '$(Configuration)' != 'Debug' ">true</PublishReadyToRun>
+    <!-- Don't use ReadyToRun when explicitly opted out -->
+    <PublishReadyToRun Condition="'$(CrossgenOutput)' == 'false'">false</PublishReadyToRun>
     <!-- Build a composite R2R image -->
     <PublishReadyToRunComposite>true</PublishReadyToRunComposite>
 

src/Framework/App.Runtime/src/Microsoft.AspNetCore.App.Runtime.sfxproj

@@ -18,6 +18,8 @@
     <!-- VMR doesn't produce valid crossgen for the host/build machine https://github.com/dotnet/source-build/issues/3793 -->
     <PublishReadyToRun Condition=" '$(DotNetBuild)' == 'true' AND '$(Crossbuild)' == 'true' ">false</PublishReadyToRun>
     <PublishReadyToRun Condition=" '$(PublishReadyToRun)' == '' AND '$(Configuration)' != 'Debug' ">true</PublishReadyToRun>
+    <!-- Don't use ReadyToRun when explicitly opted out -->
+    <PublishReadyToRun Condition="'$(CrossgenOutput)' == 'false'">false</PublishReadyToRun>
 
     <InstallerName>$(RuntimeInstallerBaseName)</InstallerName>
     <GenerateInstallers>true</GenerateInstallers>