Update status file. Timers are not supported on jsshell.

tests/lib/lib.status

Index: tests/lib/lib.status
diff --git a/tests/lib/lib.status b/tests/lib/lib.status
index f2a3cf5dc6eece4ed4f88dbb5127482fc91feae9..770b2fe4ed910d0de0a3e96424cea6f226a083f6 100644
--- a/tests/lib/lib.status
+++ b/tests/lib/lib.status
@@ -170,6 +170,7 @@ async/stream_asyncexpand_test: RuntimeError # Timer interface not supported: Iss
 async/stream_asyncmap_test: RuntimeError # Timer interface not supported: Issue 7728.
 async/stream_transformation_broadcast_test: RuntimeError # Timer interface not supported: Issue 7728.
 async/stream_controller_test: Fail # Timer interface not supported: Issue 7728.
+async/future_constructor2_test: Fail # Timer interface not supported: Issue 7728.
 mirrors/mirrors_reader_test: Skip # Running in v8 suffices. Issue 16589 - RuntimeError.  Issue 22130 - Crash (out of memory).
 
 [ $compiler == dart2js && $checked ]