Restrict DWARF alias type resolution to embedded Swift

(cherry picked from commit 9fd1719)

Author: adrian-prantl

lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.cpp

@@ -1073,7 +1073,7 @@ TypeSystemSwiftTypeRef::ResolveTypeAlias(swift::Demangle::Demangler &dem,
     type = results.GetFirstType();
 
   // Find the type by declcontext (-gdwarf-types).
-  if (!type) {
+  if (!type && flavor == swift::Mangle::ManglingFlavor::Embedded) {
     auto resolved = DWARFASTParserSwift::ResolveTypeAlias(
         GetTypeFromMangledTypename(mangled));
     if (resolved.second) {