Split a chained Set call the self-hosted compiler cannot lower

`deadDeclarators.add(d).add(memoDecl)` stopped the self-hosting build
with "chained Set method calls ... has no scriptc lowering yet".

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/compiler/src/frontend/npm-static-bundled-esm.ts

@@ -664,7 +664,8 @@ export function lowerBundledEsmInits(
         text: `(${init}${getterText(value)})`,
       });
     }
-    deadDeclarators.add(d).add(memoDecl);
+    deadDeclarators.add(d);
+    deadDeclarators.add(memoDecl);
     loaderSpans.push({ start: d.getStart(sf), end: d.getEnd() });
     lowered.add(target);
   }