anv: invalidate file descriptor of semaphore sync fd at vkQueueSubmit

anv: invalidate file descriptor of semaphore sync fd at vkQueueSubmit

We always close the in_fence at the end the anv_cmd_buffer_execbuf()
so when we take it from the semaphore, let's not forget to invalidate
it.

Note that the code leaks the fence_in if we get any error before
reaching the close(). Let's fix that in another patch or better,
rewrite the whole thing!

v2: drop redundant fd = -1 (Jason)

v3: Update commit message (Jason)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: <mesa-stable@lists.freedesktop.org>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>