Log Message:
Add vaapi and vdpau options and enable it by default on supported platform.

Bump PKGREVISION

(Please note that previosly vaapi|vdpau were available thanks to <maya> works
via `--hwdec=vaapi|vdpau' via a vaapi|vdpau-aware ffmpeg3. This change just
enable them as `--vo=vaapi|vdpau' too)