Add `--deps build` option to `bst checkout`
Description
As discussed in
https://mail.gnome.org/archives/buildstream-list/2018-September/msg00064.html,
add --deps build option to bst checkout. This will allow users to
checkout all build dependencies of a given element using a single
command.
This change also fixes an existing issue where --deps none always
resulted in an empty output. (#670 (closed))
Fixes #670 (closed).
Changes proposed in this merge request:
- Add
--deps buildoption tobst checkout
This merge request, when approved, will close issue/bug:
Fixes #670 (closed).