The get_comment_ID function was not working.
So use following code in location_meta_call function
function location_meta_call(){
$location = get_comment_meta($_GET["c"],'location', true);
}
add_filter('comment_save_pre','location_save');
function location_save($comment_content){
global $wpdb;
$id = $_POST['comment_ID'];
$text = $_POST['location_meta_box_text'];
update_comment_meta($id , 'location', $text);
return $comment_content;
}