Revert "manifest: remove GConf"
Revert "manifest: remove GConf"

GConf is still needed as ibus uses "gsettings-schema-convert"
in compilation time to convert from GConf schema to
GSettings one

This reverts commit 5fc80668d86b7b6065c07899d663135c867c052e.

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