This diff makes some tweaks to how HHVM handles command line arguments
to match what Zend PHP does. This change will allow developers to type
"hhvm foo.php -x" at the command line and "-x" will get passed as an
argument to the PHP application as it would for Zend PHP.
The basic idea is that we detect the first occurrence of either "--" or a
non-option argument. If we encounter "--" first, all subsequent arguments
are passed along to the PHP application (though the "--" token itself gets
swallowed). If we encounter a non-option argument first, that argument
and everything after it are passed along to the PHP application.
Drew Paroski
900dbd0225