[atk] Add ATK_ROLE_FOOTNOTE

[Joanmarie Diggs <joanied src gnome org>]

commit bf71cccb85fe03c2917986abaf14c5f174dac31d
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed May 17 06:33:40 2017 -0400

    Add ATK_ROLE_FOOTNOTE
    
    https://bugzilla.gnome.org/show_bug.cgi?id=748384

 atk/atkobject.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/atk/atkobject.h b/atk/atkobject.h
index a9e06dc..552f1c5 100644
--- a/atk/atkobject.h
+++ b/atk/atkobject.h
@@ -221,6 +221,7 @@ G_BEGIN_DECLS
  * subscript. @Since: ATK-2.16.
  *@ATK_ROLE_SUPERSCRIPT: An object that contains text that is displayed as a
  * superscript. @Since: ATK-2.16.
+ *@ATK_ROLE_FOOTNOTE: An object that contains the text of a footnote. @Since: ATK-2.26.
  *@ATK_ROLE_LAST_DEFINED: not a valid role, used for finding end of the enumeration
  *
  * Describes the role of an object
@@ -353,6 +354,7 @@ typedef enum
   ATK_ROLE_MATH_ROOT,
   ATK_ROLE_SUBSCRIPT,
   ATK_ROLE_SUPERSCRIPT,
+  ATK_ROLE_FOOTNOTE,
   ATK_ROLE_LAST_DEFINED
 } AtkRole;