- Add xine-lib-link-xcb.patch: fix linking of libxcb. As our code
uses the functions, we must not rely on 3rd parties to hopefully
bring the right libraries to link.
https://bugs.xine-project.org/show_bug.cgi?id=573

- Drop libsmbclient BuildRequires: requiring a library to build is
in any case wrong. It's the responsibility of a -devel package to
pull in the real libraries.

- Added xine-lib-ffmpeg3.0.patch to build against ffmpeg-3.0
libraries on PMBS.
- Add pkgconfig(libva-glx) to BuildRequires because it's a separate
package for openSUSE > 13.2.

- Replace implicit Requires from old ffmpeg with BuildRequires to
fix build in packman