[Sheriff] Disable fast/dom/cssTarget-crash.html on WebKit Linux MSAN

The test is flaky on this builder, see ${BUG}.

TBR=jarhar@chromium.org

Bug: 1152088
Change-Id: I4e2178655685994a20a258321703e362530914ad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2560295Reviewed-by: Pavol Marko <pmarko@chromium.org>
Commit-Queue: Pavol Marko <pmarko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#830937}

third_party/blink/web_tests/MSANExpectations

@@ -150,3 +150,6 @@ crbug.com/1095518 [ Linux ] crbug.com/840659 external/wpt/webrtc/simulcast/h264.
 
 # Sheriff 2020-10-05
 crbug.com/1134580 [ Linux ] virtual/eye-dropper/color-picker-show-eye-dropper.html [ Pass Timeout ]
+
+# Sheriff 2020-11-25
+crbug.com/1152088 [ Linux ] fast/dom/cssTarget-crash.html [ Pass Timeout ]