started with the doc for the hrtime ext

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@333373 c90b9560-bf6c-de11-be94-00142212c4b1
set svn props

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@333374 c90b9560-bf6c-de11-be94-00142212c4b1