All this does is construct a finish arg, but it makes it a lot nicer
to create extra-data using manifest. Additionally, it allows you to
create per-arch extra data if you set only-arches on the source.
Closes: #40
Approved by: alexlarsson
This lets you modify the project_license field in the appdata file.
This is useful because appdata files from upstream generally only
contain license information for the app itself, whereas the
bundled app may contain other code with additional licenses.
Closes: #41
Approved by: alexlarsson