Log Message:
Update at-spi2-core to 2.22.0

- depened on libXi

* at-spi-bus-launcher: fix uninitialized variable.
* Fix return value error in session_manager_connect (bgo#768881).
* Fixed a crash in atspi_accessible_clear_cache.
* Fixed a crash caused by at-spi2-registryd dying.
* Fixed some session management issues in at-spi-bus-launcher.
* Allow building without Xtst, Xi with --disable-x11
* ref_accessible_desktop: don't unref reply until we're finished with it
* Updated translations.
* Fix parsing of at-spi-bus-launcher command line arguments (bgo#765220).
* Build clean-ups.