at-spi2-core: upgrade 2.40.3 -> 2.42.0

Add patch to ensure x11_dep is defined.

What's new in at-spi2-core 2.42.0:
* Set X root property when Xwayland starts on demand.
* Several dbus introspection fixes.

Reference:
  https://gitlab.gnome.org/GNOME/at-spi2-core/-/issues/42
  https://gitlab.gnome.org/GNOME/at-spi2-core/-/merge_requests/60



Signed-off-by: Tim Orling <timothy.t.orling@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>