Also check constants in referenced constant lists

Some constants are extracted from Predefined Constants pages (e.g. php/doc-en#3413), which should alsobe checked when verifying the manual.

Author: kocsismate

build/gen_stub.php

@@ -5335,7 +5335,9 @@ function replacePredefinedConstants(string $targetDirectory, array $constMap, ar
             continue;
         }
 
-        if (stripos($xml, "<appendix") === false && stripos($xml, "<sect2") === false && stripos($xml, "<chapter") === false) {
+        if (stripos($xml, "<appendix") === false && stripos($xml, "<sect2") === false &&
+            stripos($xml, "<chapter") === false && stripos($xml, 'role="constant_list"') === false
+        ) {
             continue;
         }