[Qt] Unreviewed gardening.

* platform/qt-5.0-wk2/TestExpectations: Skip flaky svg tests.
* platform/qt-mac/TestExpectations: Skip failing CSS Shape tests.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@152492 268f45cc-cd09-0410-ab3c-d52691b4dbfc