add EXT_clip_control to mesa and enable it also for virgl
This series adds support for EXT_clip_control to mesa and also enabled support for it to virgl.
WIP: I'm not sure whether the update to gl.xml and the way glClipControlEXT is exposed is done correctly, maybe @evelikov @kusma you could take a look. thanks.
The host side is here: virgl/virglrenderer!235 (merged)
Edited by Gert Wollny