builder: Fix --verbose logging

We need to pass the right log domain in.

builder/builder-main.c

@@ -272,7 +272,7 @@ main (int    argc,
     }
 
   if (opt_verbose)
-    g_log_set_handler (NULL, G_LOG_LEVEL_DEBUG, message_handler, NULL);
+    g_log_set_handler (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, message_handler, NULL);
 
   argnr = 1;