nodejs.{prov,req}: skip if bundled module is a symlink
    
    This commit accounts for 2 use cases:
    * all modules in node_modules/ are symlinks -- nodejs.prov and .req
      correctly require appropriate rpm and don't print any of the modules as
      bundled
    * modules in node_modules/ bundled -- nodejs.prov prints these modules
      as bundled
    
    Signed-off-by: Tomas Tomecek <ttomecek@redhat.com>