Import a fresh version of the full HTML5 spec for perf testing.

Rubber-stamped by Antti Koivisto.

* Parser/HTML5-8266-FullRender.html: Added.
* Parser/HTML5-8266-ParseOnly.html: Added.
* Parser/resources/html5-8266.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159101 268f45cc-cd09-0410-ab3c-d52691b4dbfc