Sync predfined interfaces

See php/doc-base#181 for reason

Author: Girgias

language/predefined/interfaces.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- EN-Revision: ce78d59569fcae6286c46abe1b781a0b6fc594c0 Maintainer: andresdzphp Status: ready -->
+<!-- EN-Revision: 26e26a95fdc3aac9b464068953ea3105dee00f14 Maintainer: andresdzphp Status: ready -->
 <!-- Reviewed: yes Maintainer: seros -->
 
 <part xml:id="reserved.interfaces" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
@@ -29,6 +29,7 @@
  &language.predefined.unitenum;
  &language.predefined.backedenum;
  &language.predefined.sensitiveparametervalue;
+ &language.predefined.php-incomplete-class;
 
 </part>