package/tor: new package

[Thomas:
  - remove reference to BR2_LARGEFILE, this option has been
    removed. Largefile support is now guaranteed to be present.
  - rewrap Config.in help text to the appropriate length.]

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>