FS-6097 - added fifo_position macro

conf/vanilla/lang/en/ivr/sounds.xml

 <include>
+  <macro name="fifo_position">
+    <input pattern="^(.*)$">
+      <match>
+        <action function="play-file" data="ivr/ivr-you_are_number.wav"/>
+        <action function="say" data="${fifo_position}" method="pronounced" type="items"/>
+        <action function="play-file" data="ivr/ivr-in_line.wav"/>
+      </match>
+    </input>
+  </macro>
+
   <macro name="queue_position">
     <input pattern="^(\d+)$">
       <match>