nodejs-symlink-deps: add --force option
    
    if a bundled dep is encoutered, this option will force nodejs-symlink-deps
    to delete the bundled dep and replace it with a symlink.
    
    This option is useful for development, where you might have some deps already present
    in the distribution but want to use bundled or npm installed copies for others.
    
    This option should NEVER be used in offical Fedora spec files.