Update ibus to 1.5.5.

* Add french layout variant oss to simple engine
* Replace datadir/man with mandir.
* Implement lookup-table-orientation in ibus-ui-gtk3.
* Always save the content-type cache for gnome-shell password.
* Update en-us compose table and add locale tables for xkb engines.
* Wayland: Fix Small typo
* Fix gir annotations.
* simple.xml.in: add Slovak qwerty layout variant
* Delete the up/down button message on ibus-setup.
* Fix candidate panel not to be out of screen.
* Update translations.
* Remove -Werror in autogen.sh since the build still have errors.
* Add Property Panel to show IME properties.

(obache)