[gtk/asan-ci] Ignore atk-bridge leaks in asan

[Matthias Clasen <matthiasc src gnome org>]

commit 1cfa5bdcca1d00b763d03d4f705076b14a51a17a
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Jul 9 13:55:02 2020 -0400

    Ignore atk-bridge leaks in asan
    
    These will be gone before too long anyway.

 lsan.supp | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/lsan.supp b/lsan.supp
index 9e0251d750..cff8d6668b 100644
--- a/lsan.supp
+++ b/lsan.supp
@@ -6,3 +6,4 @@ leak:libfontconfig.so
 leak:libEGL_mesa.so
 leak:iris_dri.so
 leak:libpixman-1.so
+leak:libatk-bridge-2.0.so