[gtk/a11y/atspi] ci: Use test AT context with installed tests

[Emmanuele Bassi <ebassi src gnome org>]

commit 709ad126312f4ddcf12033f5120c86253438fd9a
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sat Oct 10 01:44:31 2020 +0100

    ci: Use test AT context with installed tests
    
    Otherwise we're going to need an AT-SPI service on the session, and the
    accessibility bus.

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 166d77e47b..5607e2e1aa 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -99,6 +99,7 @@ installed-tests:
   needs: []
   variables:
     EXTRA_MESON_FLAGS: "--prefix=/usr --libdir=/usr/lib64 -Dinstall-tests=true"
+    G_TEST_ACCESSIBLE: 1
   script:
     - meson subprojects update
     - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} ${BACKEND_FLAGS} ${FEATURE_FLAGS}