Rename "namedtype" to "definedtype" in stats file

Author: owen-mc

go/ql/lib/go.dbscheme.stats

@@ -681,7 +681,7 @@
             <v>101202</v>
         </e>
         <e>
-            <k>@namedtype</k>
+            <k>@definedtype</k>
             <v>12852686</v>
         </e>
         <e>