tests/semaphore-fd: wait for queues to idle before cleanup
Fixes crashes in func.sync.semaphore-fd.no-sync due to use-after-free:
../src/intel/vulkan/anv_batch_chain.c:1341: anv_execbuf_add_bo_bitset: Assertion `bo->refcount > 0' failed.
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.
Fixes crashes in func.sync.semaphore-fd.no-sync due to use-after-free:
../src/intel/vulkan/anv_batch_chain.c:1341: anv_execbuf_add_bo_bitset: Assertion `bo->refcount > 0' failed.