Ignore leak from atk_bridge_adaptor_init() when using ASAN

There doesn't seem to be any way to avoid calling it or freeing
(multiple) memory blocks allocated by it.

build/tools/before_install.sh

@@ -61,7 +61,7 @@ case $(uname -s) in
                 $SUDO apt-get update
 
                 # Install the symbols to allow LSAN suppression list to work.
-                $SUDO apt-get install -y libfontconfig1-dbgsym libglib2.0-0-dbgsym libgtk-3-0-dbgsym
+                $SUDO apt-get install -y libfontconfig1-dbgsym libglib2.0-0-dbgsym libgtk-3-0-dbgsym libatk-bridge2.0-0-dbgsym
             fi
         fi
         ;;

misc/suppressions/lsan

@@ -8,3 +8,7 @@ leak:FcLangSetCreate
 leak:FcPatternObjectInsertElt
 leak:FcValueListCreate
 leak:FcValueSave
+
+# This leak happens during GTK initialization. Requires debug symbols for
+# libatk-bridge2.0.
+leak:atk_bridge_adaptor_init