Add `faccessat2` to app.seccomp.policy, to support extension ability.

Signed-off-by: Nhuangyuchen <huangyuchen3@huawei.com>
Change-Id: I005209c4d297f86b3fa69fdbb4a0c322922095e7

services/modules/seccomp/seccomp_policy/app.seccomp.policy

@@ -233,6 +233,7 @@ statx;all
 pidfd_send_signal;all
 pidfd_open;all
 pidfd_getfd;all
+faccessat2;all
 process_madvise;all
 set_robust_list;all
 fork;arm