793dae8fe6
Use "operating-system" to denote that an element provides that to the image being created. This can then be used to specify an abstract dependency in other elements to assist in build-time image verification. Change-Id: Ic125803da65e0f8f8c20ef90b08815f4f7d09762
Create an image based on Debian. We default to unstable but DIB_RELEASE is mapped to any series of Debian.
Note that the default Debian series is unstable, and the default
mirrors for Debian can be problematic for unstable. Because apt does
not handle changing Packages files well across multiple out of sync
mirrors, it is recommended that you choose a single mirror of debian,
and pass it in via DIB_DISTRIBUTION_MIRROR.
Use of this element will also require the tool 'debootstrap' to be available on your system. It should be available on Ubuntu, Debian, and Fedora.