[gtk+] Run a11y tests with csd for make check

[Matthias Clasen <matthiasc src gnome org>]

commit d6ca66b712bcd2810498aec560cd01e42880f647
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Mar 22 14:55:55 2016 -0400

    Run a11y tests with csd for make check
    
    I've made this change for installed tests a while ago. It doesn't
    make sense for distcheck to do it differently.

 testsuite/a11y/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/testsuite/a11y/Makefile.am b/testsuite/a11y/Makefile.am
index 1d9fc05..9fd1fc0 100644
--- a/testsuite/a11y/Makefile.am
+++ b/testsuite/a11y/Makefile.am
@@ -25,6 +25,7 @@ LDADD = \
 TESTS_ENVIRONMENT =                    \
        GIO_USE_VOLUME_MONITOR=unix     \
        GSETTINGS_BACKEND=memory        \
+       GTK_CSD=1                       \
        G_ENABLE_DIAGNOSTIC=0
 
 TEST_PROGS += accessibility-dump