configure: gfio wording

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/configure b/configure
index 1ca461d..4b71afd 100755
--- a/configure
+++ b/configure
@@ -955,7 +955,7 @@
 echo "__thread                      $tls_thread"
 
 ##########################################
-# Whether or not __thread is supported for TLS
+# Check if we have required gtk/glib support for gfio
 if test "$gfio" = "yes" ; then
   cat > $TMPC << EOF
 #include <glib.h>
@@ -995,7 +995,7 @@
 fi
 fi
 
-echo "gfio                          $gfio"
+echo "gtk 2.18 or higher            $gfio"
 
 # Check whether we have getrusage(RUSAGE_THREAD)
 rusage_thread="no"