Fix type in dart2js_native/foreign_test.dart

tests/compiler/dart2js_native/foreign_test.dart

Index: tests/compiler/dart2js_native/foreign_test.dart
diff --git a/tests/compiler/dart2js_native/foreign_test.dart b/tests/compiler/dart2js_native/foreign_test.dart
index dcefa26501ed015bec4f1c2caf73a50f5f6d4979..e2a4c4e847f28fb6f907eef0bdcc9f4106f62bf8 100644
--- a/tests/compiler/dart2js_native/foreign_test.dart
+++ b/tests/compiler/dart2js_native/foreign_test.dart
@@ -22,7 +22,7 @@ foreign2() {
 }
 
 foreign11(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11) {
-  return JS("num", r"# + # + # + # + # + # + # + # + # + # + #",
+  return JS("num|String", r"# + # + # + # + # + # + # + # + # + # + #",
       a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11);
 }