add fixme comment to use lookups instead of brute force in GetEnums

Author: Vipul-Cariappa

lib/Interpreter/CppInterOp.cpp

@@ -3088,6 +3088,7 @@ namespace Cpp {
     llvm::SmallVector<clang::DeclContext*, 4> DCs;
     DC->collectAllContexts(DCs);
 
+    // FIXME: We should use a lookup based approach instead of brute force
     for (auto* DC : DCs) {
       for (auto decl = DC->decls_begin(); decl != DC->decls_end(); decl++) {
         if (auto* ND = llvm::dyn_cast_or_null<EnumDecl>(*decl)) {