Unreviewed ATK gardening

Rebaseline accessibility tests after r159747.

* platform/efl-wk1/accessibility/table-detection-expected.txt:
* platform/efl-wk2/accessibility/table-detection-expected.txt:
* platform/gtk/accessibility/table-detection-expected.txt:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159781 268f45cc-cd09-0410-ab3c-d52691b4dbfc