[Sheriff] Mark text-antialias/hyphens/hyphens-auto.html as failing

virtual/text-antialias/hyphens/hyphens-auto.html has been consistently
failing on linux. Update TestExpectations.

Bug: 1139950
NOTRY=True
TBR=kojii@chromium.org

Change-Id: I266dd7dc4a90a9bb397dc9bd64473d6d966d197a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2485831Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#818495}

third_party/blink/web_tests/TestExpectations

@@ -6465,3 +6465,6 @@ crbug.com/1011811 http/tests/devtools/indexeddb/database-version-number.js [ Ski
 # DevTools roll
 crbug.com/1011811 http/tests/devtools/profiler/agents-disabled-check.js [ Skip ]
 crbug.com/1011811 http/tests/devtools/persistence/persistence-do-not-overwrite-css.js [ Skip ]
+
+# Sheriff 2020-10-19
+crbug.com/1139950 [ Linux ] virtual/text-antialias/hyphens/hyphens-auto.html [ Failure ]