vrend: Add flag that will advertise SSO support to the guest
We did a mistake in the guest that the TGSI_SEPARABLE_SHADER property would be send without the host actually understanding this proeprty, so add a flag that can signal this support.
Hold off in setting it until we have some actual code to deal with the property and possibly with additional information.
Mesa side: mesa/mesa!17344 (merged)
Replaces: !845 (closed) Related: !733 (closed)
Edited by Gert Wollny