[test] Skip flaky test

No-Try: true
Bug: v8:13107
Change-Id: I18ed93605594c7d2baba6fb744439df0eb4cb3ba
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3785146
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81940}

test/mjsunit/mjsunit.status

@@ -424,7 +424,10 @@
   'regress/regress-1078913': [SKIP],
 
   # Baseline incompatible with jitless
-  'baseline/*': [SKIP]
+  'baseline/*': [SKIP],
+
+  # BUG(https://crbug.com/v8/13107).
+  'regress/regress-1018871': [PASS, ['tsan', SKIP]],
 }],  # 'lite_mode or variant == jitless'
 
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