[gvfs] admin: add message to configure output

[Cosimo Cecchi <cosimoc src gnome org>]

commit 229377e7cc503d02b53543be879405f0e161af43
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Tue Jun 28 07:11:10 2016 -0700

    admin: add message to configure output
    
    Saying whether it's supported or not.

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f226712..639bef0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -981,6 +981,7 @@ echo "
         CDDA support:                 $msg_cdda
         Gphoto2 support:              $msg_gphoto2
         MTP support:                  $msg_libmtp
+       Polkit support:               $msg_admin
        archive support:              $msg_archive
        AFC support:                  $msg_afc
         AFP support:                  $msg_afp