new gtk2 package available for testing

[Matthias Clasen <mclasen redhat com>]

Going to 2.4.7 with the last gtk2 update was a bad idea, since
that version of GTK+ contained a brown paperbag bug corrupting
thumbnails in nautilus.
                                                                                
The gtk2-2.4.7-2.6 package which is available for testing now should
fix that. Please test and report problems in
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=132836
                                                                                
Matthias