vkr: update venus-protocol headers to fix WA1

Ryan Neph requested to merge ryanneph/virglrenderer:fix-WA1-step3 into master

Part of step 3 of olv/venus-protocol#4. This also pulls in an unrelated change to the headers from olv/venus-protocol!60 because it's easier to include here than to coordinate separate MRs landing around the same time.

I'll wait to merge this until step 3 commences.

Venus integrators should be careful to ensure the ordering described in olv/venus-protocol#4 before integrating this change.

Signed-off-by: Ryan Neph ryanneph@google.com

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