Fix semaphore data races
Fix semaphore data races

PiperOrigin-RevId: 202371908
Change-Id: I72603b1d321878cae6404987c49e64732b676331

google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor