Add abstract __construct() test for #[\Override] (024.phpt)

Zend/tests/attributes/override/024.phpt

@@ -0,0 +1,19 @@
+--TEST--
+#[\Override]: abstract __construct
+--FILE--
+<?php
+
+abstract class P {
+    public abstract function __construct();
+}
+
+class C extends P {
+    #[\Override]
+    public function __construct() {}
+}
+
+echo "Done";
+
+?>
+--EXPECT--
+Done