[Sheriff] Update TestExpectations

Add Timeout to http/tests/devtools/compiler-script-mapping.js
expectations since the test times out flakily.

Bug: 1016772
Change-Id: I3b2b148d03df3c02b94e30f8943c11e30bfde343
TBR: rreverser@google.com
No-Try: True
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1946478Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720489}

third_party/blink/web_tests/TestExpectations

@@ -5895,7 +5895,7 @@ crbug.com/1014810 [ Mac ] virtual/threaded/external/wpt/animation-worklet/statef
 crbug.com/1019662 external/wpt/html/dom/idlharness.worker.html [ Pass Timeout ]
 
 # Temporarily disable to land source map changes that log error on failure
-crbug.com/1016772 http/tests/devtools/compiler-script-mapping.js [ Pass Failure ]
+crbug.com/1016772 http/tests/devtools/compiler-script-mapping.js [ Pass Failure Timeout ]
 crbug.com/1016772 http/tests/devtools/sources/debugger-ui/source-url-comment.js [ Pass Failure ]
 
 # Temporarily disabled to a breakpoint non-determinism issue.