[atk] Release 2.15.91

[Alejandro Piñeiro Iglesias <apinheiro src gnome org>]

commit 671685e3c975e9d65b1a62d7416cedcce22c127b
Author: Alejandro Piñeiro <apinheiro igalia com>
Date:   Mon Mar 2 18:48:10 2015 +0100

    Release 2.15.91

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 95688ab..3f65536 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,7 +17,7 @@ dnl set ATK_BINARY_AGE _and_ ATK_INTERFACE_AGE to 0.
 dnl The triplet 
 m4_define([atk_major_version], [2])
 m4_define([atk_minor_version], [15])
-m4_define([atk_micro_version], [4])
+m4_define([atk_micro_version], [91])
 m4_define([atk_version],
           [atk_major_version.atk_minor_version.atk_micro_version])