multimedia/ogle: build package with Xv support

[Andriy Gapon]

It seems that currently ogle package is built without Xv support. That
results in sub-optimal performance and features (no resize/scale). I
think that currently most systems (used for DVD playback) have support
for Xv extension, so they suffer needlessly (if the package is used).
Besides, ogle (if built with Xv support) is smart enough to detect at
run-time if Xv extension is indeed available, so there should not be any
regression at all.
I think that to enable Xv support ogle needs to grow a (build)
dependency on videoproto.

-- 
Andriy Gapon