testsuite: Mark threadstatus-T9333 as fragile in ghci way

As noted in #16555.

testsuite/tests/concurrent/should_run/all.T

@@ -88,7 +88,7 @@ test('T7970', normal, compile_and_run, [''])
 test('AtomicPrimops', normal, compile_and_run, [''])
 
 # test uses 2 threads and yield, scheduling can vary with threaded2
-test('threadstatus-9333', [omit_ways(['threaded2'])], compile_and_run, [''])
+test('threadstatus-9333', [fragile_for(16555, ['ghci']), omit_ways(['threaded2'])], compile_and_run, [''])
 
 test('T9379', normal, compile_and_run, [''])