(bug 28864) Fix UtfNormal benchmark & test case runners from regression in r85327...

(bug 28864) Fix UtfNormal benchmark & test case runners from regression in r85327, r85944

It's possible that this has some side effect on HipHop builds -- the require_once on UtfNormalDefines.php that had been moved from UtfNormalUtil.php to MediaWiki's Setup.php in r85944 had been previously damaged by r85327 sticking a MediaWiki-specific MWInit class static method call into it, making it break on all the generator & test & benchmark code which does not depend on MediaWiki.
With the require_once restored everything seems to work, though it's possible that it ends up trying to include twice on HipHop -- have not tested.