Add option to include build-system dependencies

[apljungquist]

Fixes jazzband/pip-tools#1396

The goal is to facilitate reproducible builds by compiling version locks for all packages used.

Contributor checklist

• [x] Provided the tests for the changes.
• [x] Assure PR title is short, clear, and good to be included in the user-oriented changelog

Maintainer checklist

• [ ] Assure one of these labels is present: backwards incompatible, feature, enhancement, deprecation, bug, dependency, docs or skip-changelog as they determine changelog listing.
• [ ] Assign the PR to an existing or new milestone for the target version (following Semantic Versioning).