only set DirectEvaluationCapability for direct async

Author: guybedford

spec.html

@@ -499,7 +499,8 @@ <h1>InnerModuleEvaluation( _module_, _stack_, _index_ )</h1>
           1. <ins>Set _module_.[[AsyncParentModules]] to a new empty List.</ins>
           1. <ins>Set _module_.[[PendingAsyncDependencies]] to the length of _pendingAsyncDependencies_.</ins>
           1. <ins>Let _capability_ be ! NewPromiseCapability(%Promise%).</ins>
-          1. <ins>Set _module_.[[DirectEvaluationCapability]] to _capability_.</ins>
+          1. <ins>If _module_[[AsyncModule]] is *true*, then</ins>
+            1. <ins>Set _module_.[[DirectEvaluationCapability]] to _capability_.</ins>
           1. <ins>Set _module_.[[EvaluationCapability]] to _capability_.</ins>
           1. <ins>If the length of _pendingAsyncDependencies_ is 0, then</ins>
             1. <ins>Perform ! _module_.ExecuteModule(_module_.[[DirectEvaluationCapability]]).</ins>