testsuite: Mark T13702 as broken with TSAN due to #18884

testsuite/tests/dynlibs/all.T

@@ -9,4 +9,4 @@ test('T4464', [req_shared_libs, unless(opsys('mingw32'), skip)], makefile_test,
 test('T5373', [req_shared_libs], makefile_test, [])
 
 # It's not clear exactly what platforms we can expect this to succeed on.
-test('T13702', unless(opsys('linux'), skip), makefile_test, [])
+test('T13702', [when(have_thread_sanitizer(), expect_broken(18884)), unless(opsys('linux'), skip)], makefile_test, [])