kernel/xsi_semaphore: set otime when semop() succeeds

used by PR_OpenSemaphore in NSPR to check the creator inited.

Change-Id: I626c6ab0d50896c94224718ca4fa0788f74ae27a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4824
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

src/system/kernel/posix/xsi_semaphore.cpp

@@ -1268,6 +1268,7 @@ _user_xsi_semop(int semaphoreID, struct sembuf *ops, size_t numOps)
 			XsiSemaphore *semaphore = semaphoreSet->Semaphore(semaphoreNumber);
 			semaphore->SetPid(getpid());
 		}
+		semaphoreSet->SetLastSemopTime();
 	}
 	return result;
 }