xorriso: new package

xorriso cd/dvd/bd iso 9660 manipulation and disc burner.

libburnia is a project for reading, mastering and writing
optical discs. Currently it is comprised of libraries named
libisofs, libburn, libisoburn, a cdrecord emulator named cdrskin,
and an integrated multi-session tool named xorriso.
The software runs on GNU/Linux, FreeBSD, Solaris, NetBSD.
It is base of the  GNU xorriso package and is actively maintained.

[Thomas:
 - Rewrap Config.in help text
 - Add optional dependencies on libcdio, readline, acl, attr, zlib,
   bzip2.
 - Handle thread support.
 - Add hash file.]

Signed-off-by Stephen M. Kenton <skenton@ou.edu>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>