[Fuchsia] Fix timeline semaphore CTS tests

Timeline semaphores not exportable.

Change-Id: I4f3775b327e30ffdc3d921625dec83ea668a39ea
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/mesa/+/480317
Reviewed-by: John Bauman <jbauman@google.com>
1 file changed