Replace the GraphUpdated handler with TrackerNotifier

Submitted by Yetoo1 @Yetoo1

Link to original bug (#776671)

Description

I am trying to build this application from source in my git cloned directory of the master branch and I have come across this make error:

photos-tracker-change-monitor.c:95:1: error: packed attribute is unnecessary for ‘_TrackerResourcesEvent’ [-Werror=packed] } attribute ((packed));

Full make is located here: http://pastebin.com/EvAHxa4W