Log Message:
Update at-spi2-atk from 2.3.5 -> 2.5.2 with extra patch to avoid conflict
with at-spi-atk. It makes the assumption that at-spi2-atk is used with
gtk3 only.

2.5.2:
* Fix for bug 677211 - The collection interface's MATCH_ANY fails for states

2.3.91:
* Have GetIndexInParent() return a signed int, per the spec.
* Send a DoAction reply message before invoking atk (works around
  atk_action_do_action potentially not returning right away for gtk).

2.3.90:
* Have GrabFocus return a bool, per the spec, rather than a uint32.
* Fix a potential crash when emitting a signal if the ATK implementor
  misbehaves.

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