Workaround for dma-bufs that don't support lseek

Applies only to dma-bufs imported with VK_KHR_external_memory_fd.

Change-Id: Idefd301d2cea1519927638cd2e8f1576e79c0008
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/mesa/+/514945
Reviewed-by: John Bauman <jbauman@google.com>
5 files changed