package/liburiparser: New package

[Thomas:
 - put liburiparser at the right place in package/Config.in, i.e
   sorted alphabetically
 - use positive logic for the wchar test.]

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