Expand the defines from JSTokenizer::__construct() placing them at the top of the...

Expand the defines from JSTokenizer::__construct() placing them at the top of the file.
This fixes the Notices that would be produced if several JSTokenizer were instantiated.
jsminplus was added in r91591.

Defines code was generated with:
$js = new JSTokenizer();
foreach ($js->opTypeNames as $operand => $name) echo "define('OP_$name', '$operand');\n";
foreach ($js->keywords as $keyword) echo "define('KEYWORD_" . strtoupper($keyword) . "', '$keyword');\n";