Disable unstable webstorage tests.
Bug 945222 - Update web-platform-tests to revision 8a96f28b0724090150a26d87f6b614c65a921d3d

--HG--
rename : testing/web-platform/tests/shadow-dom/elements-and-dom-objects/shadowroot-object/shadowroot-attributes/test-008.html => testing/web-platform/tests/shadow-dom/elements-and-dom-objects/shadowroot-object/shadowroot-attributes/activeElement-confirm-return-null.html
Update to latest wptrunner