autotest: Add peerd user/group to security_AccountsBaseline

BUG=chromium:402672
TEST=This test now passes against gizmo builds.

Change-Id: Ic656f9341f57c0c3c20e7829e01cbcf136b581e9
Reviewed-on: https://chromium-review.googlesource.com/225699
Tested-by: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
2 files changed