libva 2.1.0

* Bump VA-API version to 1.1.0 and libva to 2.1.0
* Add API for multi-frame processing
* Add entrypoint VAEntrypointStats for Statistics
* Add data structures for HEVC FEI support
* Add new attributes for decoding/encoding/video processing
* Add new VPP filter for Total Color Correction
* Add blending interface in VPP
* Add rotation interface in VPP
* Add mirroring interface in VPP
* Add Chroma siting flags in VPP
* Add new color standard definitions
* Add new interface for exporting surface
* Add message callbacks for drivers to use

git tag: 2.1.0
sha1sum: 9ecde2b6c9deda16e895a0b00b8aef3a765acb4c libva-2.1.0.tar.bz2