manifest: Track tracker master
manifest: Track tracker master

See https://mail.gnome.org/archives/desktop-devel-list/2013-November/msg00030.html

chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,vrutkovs/vrutkovs.github.io,chergert/gnome-continuous,chergert/gnome-continuous,vrutkovs/vrutkovs.github.io