4a4fa8b2d7
Commit a76b28bd moved the dbus-interfaces to the dbus-interfaces directory without changing the path for docs build as well, resulting in a fail of the build when building with gtk_doc=true. So change the path in the build accordingly to ensure that the build does not fail when building with gtk_doc=true. https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/236