signer: Add signing support for nvidia lp0 firmware from signer

Signer was calling sign_official_build.sh in a manner that wasn't
being accepted correctly.  Also add test keys from firmware branch.

BUG=chrome-os-partner:44227
TEST=sign_official_build.sh nv_lp0_firmware tegra_lp0_resume.fw tests/devkeys tegra_lp0_resume.fw.signed versions.default
BRANCH=signer

Change-Id: Icd298ac75e3da746220826dc2fb9cc2466e41f1d
Signed-off-by: David Riley <davidriley@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/297802
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
2 files changed