[ownership] Compile stdlibCore with ownership stripping after serialization.

Author: gottesmm

stdlib/public/core/CMakeLists.txt

@@ -288,6 +288,8 @@ if(SWIFT_STDLIB_ENABLE_STDLIBCORE_EXCLUSIVITY_CHECKING)
   list(APPEND swift_stdlib_compile_flags "-enforce-exclusivity=checked")
 endif()
 
+list(APPEND swift_stdlib_compile_flags "-Xfrontend" "-enable-ownership-stripping-after-serialization")
+
 if(SWIFT_CHECK_ESSENTIAL_STDLIB)
   add_swift_target_library(swift_stdlib_essential ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} IS_STDLIB IS_STDLIB_CORE
       INSTALL_IN_COMPONENT never_install