mosys: Fix the seccomp policy filter on arm64

Remove 'readlink' which is a nonexistent syscall on arm64

BUG=None
TEST='Test mosys manually'

Change-Id: I73daa02e6659653199f46d089936a189f3bff6e7
Previous-Reviewed-on: https://chromium-review.googlesource.com/1306534
(cherry picked from commit 653c810a15396a10b4a7687c89e9b251bc11f57f)
Reviewed-on: https://chromium-review.googlesource.com/c/1318710
Reviewed-by: C Shapiro <shapiroc@chromium.org>
Commit-Queue: Gregory Meinke <gmeinke@chromium.org>
Tested-by: Gregory Meinke <gmeinke@chromium.org>
Trybot-Ready: Gregory Meinke <gmeinke@chromium.org>
1 file changed