seccomp: add fstatfs to the filter

Since dash uses fstatfs now to check the source of files, allow it.

BUG=chromium:569168
TEST=precq passes

Change-Id: I5354843ed350a0ca95664f72316f317c276ea450
Reviewed-on: https://chromium-review.googlesource.com/1545546
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
3 files changed