ospack: Store more information in /etc/os-release
Add the timestamp as BUILD_ID and the image type as VARIANT_ID
in /etc/os-release, so at some point we'll be able to phase
out /etc/image_version.
Add the timestamp as BUILD_ID and the image type as VARIANT_ID
in /etc/os-release, so at some point we'll be able to phase
out /etc/image_version.