Log Message:
Update atk to 2.2.0.
Based on PR#45738 by Patrick Welche.

Changes in version 2.2.0:
=========================
*
* Updated Gujarati, Oriya, Assamese, Danish, Portuguese, Czech and
*  Catalan (Valencian) translations

Changes in version 2.1.92:
==========================
*
* Updated Visual Studio files due AtkWindow addition
* Bug 649577: atk_add_global_event_listener should only accept ATK events
* Minor documentation updates
* Updated German, Basque, Japanese, Serbian, Catalan, Tamil, Punjabi,
*  Asturian, Italian, Polish, British English, Brazilian Portuguese,
*  Korean, Telugu and Kannada Translation

Changes in version 2.1.5:
=========================
*
* Bug 638924: Add AtkWindow
* Fixing out of tree compilation on Win32
* Update README.txt
* Fixing release number of the new ATK roles added
* Updated Traditional Chinese, Indonesian, Bulgarian, French,
*  Hungarian and Swedish translations

Changes in version 2.1.0:
=========================
*
* Bug 654767: shlib downgrade at update atk-1.32.0 to atk-2.0.1
* Bug 651343: New ATK Roles
* Added Leon Fan as maintainer
* Improved Visual C++ 2010 infrastructure
* Updated Russian, Slovenian, Persian, Hebrew, Lithuanian, Latvian,
*  Norwegian, Galician, and Spanish translations