ARM doesn't have a generic Linux image due to the soc-specific nature of Linux kernels today, so we drop the manual installation of that package, replacing it with a dist-upgrade instead. This involved tweaks to the dpkg and fedora install-package scripts. Change-Id: I97924b80ca87781307e1087b9fe4b18215770e84
Provide dpkg specific image building glue.
The ubuntu element needs customisations at the start and end of the image build process that do not apply to RPM distributions, such as using the host machine HTTP proxy when installing packages. These customisations live here, where they can be used by any dpkg based element.
The dpkg specific version of install-packages is also kept here.