Log Message:
MesaLib: build VDPAU support if it's available.
Tested on NetBSD with nvidia GTX 770 (nouveau), running mpv with
env VDPAU_DRIVER=nouveau.

This may cause a PLIST mismatch/build issues on FreeBSD/Linux, as I expect
libvdpau_nvidia.so to be created for those. we will find out the hard way.

bump PKGREVISION