[FrameworkBundle] fixed XSD for the new exception-controller option

src/Symfony/Bundle/FrameworkBundle/Resources/config/schema/symfony-1.0.xsd

@@ -22,6 +22,7 @@
         <xsd:attribute name="cache-warmer" type="cache_warmer" />
         <xsd:attribute name="charset" type="xsd:string" />
         <xsd:attribute name="error-handler" type="xsd:string" />
+        <xsd:attribute name="exception-controller" type="xsd:string" />
         <xsd:attribute name="ide" type="xsd:string" />
     </xsd:complexType>