Enable test_multiprocessing_spawn:test_wait_timeout back

Author: steve-s

graalpython/com.oracle.graal.python.test/src/tests/unittest_tags/test_multiprocessing_spawn.txt

@@ -47,6 +47,7 @@
 *graalpython.lib-python.3.test.test_multiprocessing_spawn.TestWait.test_wait_slow
 *graalpython.lib-python.3.test.test_multiprocessing_spawn.TestWait.test_wait_socket
 *graalpython.lib-python.3.test.test_multiprocessing_spawn.TestWait.test_wait_socket_slow
+*graalpython.lib-python.3.test.test_multiprocessing_spawn.TestWait.test_wait_timeout
 *graalpython.lib-python.3.test.test_multiprocessing_spawn.WithProcessesTestBarrier.test_abort
 *graalpython.lib-python.3.test.test_multiprocessing_spawn.WithProcessesTestBarrier.test_abort_and_reset
 *graalpython.lib-python.3.test.test_multiprocessing_spawn.WithProcessesTestBarrier.test_action