[test] Skip flaky test under tsan

test/mjsunit/mjsunit.status

Index: test/mjsunit/mjsunit.status
diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status
index 9e9d062efdb4a9914f9f5956ac23a10e89d63903..c1e358dc9c883db2e984ba20e8161b35cc096181 100644
--- a/test/mjsunit/mjsunit.status
+++ b/test/mjsunit/mjsunit.status
@@ -166,6 +166,9 @@
   # TODO(vogelheim): big-object-literal exceeds the stack in debug builds,
   #                  which makes the test useless.
   'big-object-literal': [PASS, ['mode == debug', SKIP]],
+
+  # BUG(v8:5807): Flaky data race.
+  'wasm/embenchen/fannkuch': [PASS, ['tsan', SKIP]],
 }],  # ALWAYS
 
 ['novfp3 == True', {