arc: Add clock_gettime to arcvm_boot_notification_server's sepolicy.

The recent libchrome uprev (crrev.com/c/2257673) adds a call of
clock_gettime in arcvm_boot_notification_server.
This CL adds clock_gettime to the policy files to allow the call.

BUG=b:171000355
TEST=arcvm boots on kukui-arc-r

Disallow-Recycled-Builds: test-failures
Change-Id: I63b709893ddbc4905402d463103f492f6e2b384a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2478704
Commit-Queue: Ereth McKnight-MacNeil <ereth@chromium.org>
Tested-by: Ereth McKnight-MacNeil <ereth@chromium.org>
Auto-Submit: Yuichiro Hanada <yhanada@chromium.org>
Reviewed-by: Ereth McKnight-MacNeil <ereth@chromium.org>
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
diff --git a/arc/vm/boot_notification_server/arcvm_boot_notification_server-seccomp-amd64.policy b/arc/vm/boot_notification_server/arcvm_boot_notification_server-seccomp-amd64.policy
index 1ccf296..636702d 100644
--- a/arc/vm/boot_notification_server/arcvm_boot_notification_server-seccomp-amd64.policy
+++ b/arc/vm/boot_notification_server/arcvm_boot_notification_server-seccomp-amd64.policy
@@ -36,3 +36,4 @@
 exit: 1
 exit_group: 1
 rt_sigreturn: 1
+clock_gettime: 1
diff --git a/arc/vm/boot_notification_server/arcvm_boot_notification_server-seccomp-arm.policy b/arc/vm/boot_notification_server/arcvm_boot_notification_server-seccomp-arm.policy
index 5010862..941f417 100644
--- a/arc/vm/boot_notification_server/arcvm_boot_notification_server-seccomp-arm.policy
+++ b/arc/vm/boot_notification_server/arcvm_boot_notification_server-seccomp-arm.policy
@@ -37,3 +37,4 @@
 restart_syscall: 1
 exit: 1
 rt_sigreturn: 1
+clock_gettime: 1