Mark audits2-successful-run.js timeout on Linux MSAN

TBR=battre@chromium.org
NOTRY=true

Bug: 680917
Change-Id: Ib7d69027cd72f6a5c56cb4d6a637417f901f4d3d
Reviewed-on: https://chromium-review.googlesource.com/850712Reviewed-by: Xida Chen <xidachen@chromium.org>
Commit-Queue: Xida Chen <xidachen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#526983}

third_party/WebKit/LayoutTests/MSANExpectations

@@ -45,6 +45,8 @@ crbug.com/736370 [ Linux ] external/wpt/editing/run/removeformat.html [ Timeout
 crbug.com/736554 [ Linux ] external/wpt/IndexedDB/nested-cloning-large-multiple.html [ Timeout ]
 crbug.com/736554 [ Linux ] virtual/mojo-blobs/external/wpt/IndexedDB/nested-cloning-large-multiple.html [ Timeout ]
 
+crbug.com/680917 [ Linux ] http/tests/devtools/audits2/audits2-successful-run.js [ Timeout ]
+
 # Intentionally failed allocations, via partitionAllocGenericFlags()
 crbug.com/577889 [ Linux ] fast/js/typed-array-allocation-failure.html [ Crash ]