testsuite: Mark T15349 as broken in the ghci way

See #15349.

libraries/base/tests/all.T

@@ -241,4 +241,4 @@ test('T14425', normal, compile_and_run, [''])
 test('T10412', normal, compile_and_run, [''])
 test('T13896', normal, compile_and_run, [''])
 test('T13167', normal, compile_and_run, [''])
-test('T15349', [exit_code(1)], compile_and_run, [''])
+test('T15349', [exit_code(1), expect_broken_for(15349, 'ghci')], compile_and_run, [''])