Update status file for Firefox on windows.
Update status file for Firefox on windows.

Another CL (https://codereview.chromium.org/2661063004/diff/1/tests/co19/co19-dart2js.status) already updated the same lines for Linux.
Apparently the Windows version was now updated as well.

Review-Url: https://codereview.chromium.org/2677033004 .

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