Mark virtual/android/url-bar/bottom-and-top-fixed-sticks-to-top.html as failing on Linux

TBR=pdr@chromium.org

Bug: 898394
Change-Id: I0286d9374cd941546798de6f6507c8f81f436c7d
Reviewed-on: https://chromium-review.googlesource.com/c/1297770Reviewed-by: Alan Cutter <alancutter@chromium.org>
Commit-Queue: Alan Cutter <alancutter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#602260}

third_party/WebKit/LayoutTests/TestExpectations

@@ -5463,3 +5463,6 @@ crbug.com/898214 [ Mac10.10 Mac10.11 ] external/wpt/html/dom/interfaces.https.ht
 crbug.com/898214 [ Mac10.11 ] virtual/outofblink-cors-ns/external/wpt/fetch/api/credentials/authentication-basic.any.html [ Failure ]
 crbug.com/898050 [ Mac Win ] fast/workers/taskqueue/basic.html [ Pass Timeout ]
 crbug.com/898378 [ Mac10.13 ] fast/scroll-behavior/smooth-scroll/keyboard-scroll.html [ Timeout ]
+
+# Sheriff 2018-10-24
+crbug.com/898394 [ Linux ] virtual/android/url-bar/bottom-and-top-fixed-sticks-to-top.html [ Failure ]