Fix GTK layout-test break after r64114

Reviewed by NOBODY.

Skipping the test for Qt until we can find a non-fragile way to write
the test.

* fast/events/spatial-navigation/snav-clipped-overflowed-content.html:
* platform/qt/Skipped:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@64115 268f45cc-cd09-0410-ab3c-d52691b4dbfc
3 files changed