[sheriff] Expect failure for media/video-aspect-ratio.html on Linux.

TBR=fdoray@chromium.org

No-Try: true
Bug: 1083293
Change-Id: Idfc19377184872f9712ec42c33c7dc7a12896d4f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2229298Reviewed-by: François Doray <fdoray@chromium.org>
Commit-Queue: François Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#774709}

third_party/blink/web_tests/TestExpectations

@@ -5904,3 +5904,4 @@ crbug.com/1011811 http/tests/devtools/persistence/automapping-sourcemap.js [ Pas
 # Sheriff 2020-06-03
 crbug.com/1088441 [ Mac ] http/tests/loading/bad-server-subframe.html [ Pass Failure ]
 crbug.com/1090822 [ Mac10.10 ] virtual/cascade/fast/forms/month/month-appearance-basic.html [ Pass Failure ]
+crbug.com/1083293 [ Linux ] media/video-aspect-ratio.html [ Pass Failure ]