Sam Varshavchik authored Feb 14, 2015 and Jean-Baptiste Kempf committed Feb 15, 2015

Have make clean remove libdvdcss.spec that autoconf creates from
libdvdcss.spec.in

Include %{?dist} tag into the RPM release tag, this a convention with
most RPM-based distributions.

The rpm packages were missing a few files.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>