WPE-focused test gardening.

WPE-focused test gardening.
https://bugs.webkit.org/show_bug.cgi?id=175385

Unreviewed test gardening.

Patch by Ms2ger <Ms2ger@igalia.com> on 2017-08-09

* platform/wpe/TestExpectations: Marked failing tests.
* platform/wpe/fast/events/touch/basic-single-touch-events-expected.txt: Added platform-specific expectation.
* platform/wpe/js/date-timeClip-large-values-expected.txt: Removed (the platform-neutral expectation is fine).
* platform/wpe/js/dom/global-constructors-attributes-dedicated-worker-expected.txt: Updated for Cache enabling.
* transitions/clip-path-path-transitions-expected.txt: Updated for test change in r219243.
* transitions/resources/transition-test-helpers.js:
(parseClipPath): Updated to support the quotes in clip-path-path-transitions.html

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@220460 268f45cc-cd09-0410-ab3c-d52691b4dbfc