[build] Disable single includes and deprecation
[build] Disable single includes and deprecation

Disabling the single header file inclusion and deprecations helps
making Unique compliant with the GLib and GTK+ 3.0 API cycle.

GNOME/unique,Distrotech/libunique,Distrotech/libunique,Distrotech/libunique,GNOME/unique,GNOME/unique