vlc: add PACKAGECONFIG for samba, upnp, dvdnav, sftp, vorbis, dc1394, dv1394, svg, svgdec

* hopefully fixes:
WARN: vlc: vlc rdepends on libavc1394, but it isn't a build dependency?
WARN: vlc: vlc rdepends on libcroco, but it isn't a build dependency?
WARN: vlc: vlc rdepends on libcrypto, but it isn't a build dependency?
WARN: vlc: vlc rdepends on libdvdnav, but it isn't a build dependency?
WARN: vlc: vlc rdepends on librsvg, but it isn't a build dependency?
WARN: vlc: vlc rdepends on libssh2, but it isn't a build dependency?
WARN: vlc: vlc rdepends on libssl, but it isn't a build dependency?
WARN: vlc: vlc rdepends on libupnp, but it isn't a build dependency?
WARN: vlc: vlc rdepends on libvorbis, but it isn't a build dependency?
WARN: vlc: vlc rdepends on libxml2, but it isn't a build dependency?

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>