Fix have python-sugar3 depend on gir1.2-gconf-2.0, and stop build-depend explicitly on it.
Fix have python-sugar3 depend on gir1.2-gconf-2.0, and stop build-depend explicitly on it.

tchx84/debian-pkg-sugar-toolkit-gtk3,tchx84/debian-pkg-sugar-toolkit-gtk3,tchx84/debian-pkg-sugar-toolkit-gtk3