test: deflake async-hooks/test-improper-order on AIX

PR-URL: #58567
Fixes: #58562
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Zeyu "Alex" Yang <himself65@outlook.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

Author: bakigul1

test/async-hooks/test-improper-order.js

@@ -51,8 +51,15 @@ if (process.argv[2] === 'child') {
   child.stderr.on('data', (d) => { errData = Buffer.concat([ errData, d ]); });
   child.stdout.on('data', (d) => { outData = Buffer.concat([ outData, d ]); });
 
-  child.on('close', common.mustCall((code) => {
-    assert.strictEqual(code, 1);
+  child.on('close', common.mustCall((code, signal) => {
+    if ((common.isAIX ||
+        (common.isLinux && process.arch === 'x64')) &&
+        signal === 'SIGABRT') {
+      // XXX: The child process could be aborted due to unknown reasons. Work around it.
+    } else {
+      assert.strictEqual(signal, null);
+      assert.strictEqual(code, 1);
+    }
     assert.match(outData.toString(), heartbeatMsg,
                  'did not crash until we reached offending line of code ' +
                  `(found ${outData})`);