Meta: export some event loop-related definitions

This allows Bikeshed-using specifications to autolink to "event loop
processing model" and to "update the rendering". A particular consumer
is https://github.com/WICG/paint-timing.

source

@@ -88557,7 +88557,8 @@ dictionary <dfn>PromiseRejectionEventInit</dfn> : <span>EventInit</span> {
   microtask checkpoint</dfn> flag, which must initially be false. It is used to prevent reentrant
   invocation of the <span>perform a microtask checkpoint</span> algorithm.</p>
 
-  <h5 id="event-loop-processing-model"><span id="processing-model-8"></span>Processing model</h5>
+  <h5 id="event-loop-processing-model" data-lt="event loop processing model" data-dfn-type="dfn"
+  data-export=""><span id="processing-model-8"></span>Processing model</h5>
   <!-- EVENT LOOP -->
 
   <p>An <span>event loop</span> must continually run through the following steps for as long as it
@@ -88585,9 +88586,9 @@ dictionary <dfn>PromiseRejectionEventInit</dfn> : <span>EventInit</span> {
    <li><p><i>Microtasks</i>: <span>Perform a microtask checkpoint</span>.</p></li>
 
    <li>
-    <p><dfn>Update the rendering</dfn>: If this <span>event loop</span> is a <span>browsing
-    context</span> <span>event loop</span> (as opposed to a <a href="#workers">worker</a>
-    <span>event loop</span>), then run the following substeps.</p>
+    <p><dfn data-export="">Update the rendering</dfn>: If this <span>event loop</span> is a
+    <span>browsing context</span> <span>event loop</span> (as opposed to a <a
+    href="#workers">worker</a> <span>event loop</span>), then run the following substeps.</p>
 
     <ol>
      <li><p>Let <var>now</var> be the value that would be returned by the <code>Performance</code>