Unreviewed gardening.

Move fast/harness/sample-fail-mismatch-reftest.html to the platform
independent TestExpectations, since all ports skip it as expected.

* TestExpectations:
* platform/efl/TestExpectations:
* platform/gtk/TestExpectations:
* platform/mac/TestExpectations:
* platform/win/TestExpectations:
* platform/wincairo/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@162604 268f45cc-cd09-0410-ab3c-d52691b4dbfc