buildroot

package/libva-utils: new package

The utils provided by this package were formerly packaged with libva.

Libva contained a patch not to compile mpeg2vldemo to reduce
dependencies by avoiding C++, this patch is not moved to this package.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Reviewed-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>