[Qt] Enable CANVAS_PATH flag
https://bugs.webkit.org/show_bug.cgi?id=108508

Reviewed by Simon Hausmann.

Tools:

Also enable CANVAS_PATH flag for Qt.

* qmake/mkspecs/features/features.pri:

LayoutTests:

Unskip CANVAS_PATH tests.

* platform/qt/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144300 268f45cc-cd09-0410-ab3c-d52691b4dbfc