Disable WorkerThreadTest.TestTaskExecutedBeforeThreadDeletion on Linux

The test is flaky
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=blink_platform_unittests&tests=WorkerThreadTest.TestTaskExecutedBeforeThreadDeletion

Bug: 934088
Change-Id: I4d783da07af305a094d41f32383e16e98ca48f43
Reviewed-on: https://chromium-review.googlesource.com/c/1481310
Reviewed-by: Christos Froussios <cfroussios@chromium.org>
Reviewed-by: Alex Clarke <alexclarke@chromium.org>
Auto-Submit: Christos Froussios <cfroussios@chromium.org>
Commit-Queue: Alex Clarke <alexclarke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#634589}
1 file changed