[gnome-builder] build: set NO_AT_BRIDGE=1 when running tests

[Christian Hergert <chergert src gnome org>]

commit 15c0a117e63d83895f6d0c4a3f29115429b1c607
Author: Christian Hergert <chergert redhat com>
Date:   Mon Sep 9 17:13:35 2019 -0700

    build: set NO_AT_BRIDGE=1 when running tests
    
    This fixes an error when running tests on F31 beta, but in general it's
    nice to not have the bridge involved with the tests.

 src/tests/meson.build | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/tests/meson.build b/src/tests/meson.build
index 0b409f2b3..281a02094 100644
--- a/src/tests/meson.build
+++ b/src/tests/meson.build
@@ -19,6 +19,7 @@ test_env = [
   'GSETTINGS_SCHEMA_DIR=@0@/data/gsettings'.format(meson.build_root()),
   'PYTHONDONTWRITEBYTECODE=yes',
   'MALLOC_CHECK_=2',
+  'NO_AT_BRIDGE=1',
 ]
 
 test_cflags = [