vrend: Add host check for clip_control and handle it

Gert Wollny requested to merge gerddie/virglrenderer:add-clip-control into master

The origin change is already handled within Gallium, so it is only necessary to deal with the Z range property.

Closes #104 (closed)

Guest side (relevant parts are already reviewed): mesa/mesa!867 (merged)

Edited by Gert Wollny

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