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
Reviewed-on: https://chromium-review.googlesource.com/1306534
Commit-Ready: Adam Kallai <kadam@inf.u-szeged.hu>
Tested-by: Adam Kallai <kadam@inf.u-szeged.hu>
Reviewed-by: Gregory Meinke <gmeinke@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed