lavapipe fixes
This is a bunch of fixes and improvments for lavapipe CTS tests and vulkan demos.
The last two patches are just some refactoring from the CL tree that made sense to pull into vulkan here.
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
This is a bunch of fixes and improvments for lavapipe CTS tests and vulkan demos.
The last two patches are just some refactoring from the CL tree that made sense to pull into vulkan here.