test: fixing arguments order in assert.strictEqual()

PR-URL: nodejs#24152
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

test/parallel/test-event-emitter-add-listeners.js

@@ -42,8 +42,8 @@ const EventEmitter = require('events');
   });
 
   const hello = common.mustCall(function(a, b) {
-    assert.strictEqual('a', a);
-    assert.strictEqual('b', b);
+    assert.strictEqual(a, 'a');
+    assert.strictEqual(b, 'b');
   });
 
   ee.once('newListener', function(name, listener) {