gnu: vlc: Enable libdvdread and libdvdcss support.

* gnu/packages/video.scm (libdvdread): Compile with libdvdcss support;
  (vlc): Add libdvdread as input.

gnu/packages/video.scm

@@ -22,6 +22,7 @@
 ;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
 ;;; Copyright © 2017 Gregor Giesen <giesen@zaehlwerk.net>
 ;;; Copyright © 2017 Rutger Helling <rhelling@mykolab.com>
+;;; Copyright © 2018 Roel Janssen <roel@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -831,6 +832,7 @@ (define-public vlc
        ("libcddb" ,libcddb)
        ("libdvbpsi" ,libdvbpsi)
        ("libgcrypt" ,libgcrypt)
+       ("libdvdread" ,libdvdread)
        ("libkate" ,libkate)
        ("libmad" ,libmad)
        ("libogg" ,libogg)
@@ -1359,6 +1361,12 @@ (define-public libdvdread
     (build-system gnu-build-system)
     (home-page "http://dvdnav.mplayerhq.hu/")
     (synopsis "Library for reading video DVDs")
+    (arguments
+     `(#:configure-flags '("--with-libdvdcss=yes")))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)))
+    (inputs
+     `(("libdvdcss" ,libdvdcss)))
     (description
      "Libdvdread provides a simple foundation for reading DVD video
 disks.  It provides the functionality that is required to access many