Added a missing method in the Constraint interface

lib/Doctrine/DBAL/Schema/Constraint.php

@@ -21,6 +21,8 @@
 
 namespace Doctrine\DBAL\Schema;
 
+use Doctrine\DBAL\Platforms\AbstractPlatform;
+
 /**
  * Marker interface for contraints
  *
@@ -34,5 +36,7 @@ interface Constraint
 {
     public function getName();
 
+    public function getQuotedName(AbstractPlatform $platform);
+
     public function getColumns();
 }