archive-release: Allow image types to be excluded

Exclude certain image types from the packaged build.
This allows us to build in the automated environment for regression,
general testing or simply for availability of extra image types for
internal use without necessarily packaging them in the installers.

Signed-off-by: Drew Moseley <drew_moseley@mentor.com>
Merge pull request #151 from drewmoseley/extra-images-exclude

archive-release: Allow image types to be excluded