Fixed mym compilation

Signed-off-by: Nicola Vigano <nicola.vigano@esrf.fr>

zUtil_Conf/conf.example.xml

@@ -65,6 +65,7 @@
       <path>zUtil_DB/mym.cpp</path>
       <includes>
         <!-- Should be substituted by system package -->
+        <path>/usr/include/mysql/</path>
       </includes>
       <libraries>
         <path>/usr/lib64/mysql/</path>