[test] Skip failing test after clang roll.

BUG=v8:4995
LOG=n
NOTRY=true
TBR=thakis@chromium.org, titzer@chromium.org

Review-Url: https://codereview.chromium.org/1955013002
Cr-Commit-Position: refs/heads/master@{#36064}

test/unittests/unittests.status

@@ -12,4 +12,9 @@
   'AstDecoderTest.AllLoadMemCombinations': [SKIP],
   'AstDecoderTest.AllStoreMemCombinations': [SKIP],
 }],  # 'byteorder == big'
+
+['tsan', {
+  # BUG(v8:4995).
+  'ThreadLocalStorageTest.DoTest': [SKIP],
+}],  # 'tsan'
 ]