Add a --daemon-only build option

[braydonf]

Adds a --daemon-only build option for deb and rpm packages for CLI usage.

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This change is 

[MarkusPettersson98]

@MarkusPettersson98 reviewed 3 files and all commit messages, and made 3 comments.
Reviewable status: 3 of 8 files reviewed, 3 unresolved discussions (waiting on braydonf).

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build.sh line 37 at r1 (raw file):

GOTATUN="false"
# If only the daemon should be built.
DAEMON_ONLY="false"

Suggestion:

# If only the daemon should be built and packaged separately (.deb and .rpm).
DAEMON_ONLY="false"

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build.sh line 388 at r2 (raw file):

cargo run -p mullvad-api --bin relay_list "${CARGO_ARGS[@]}" > build/relays.json

function build_daemon_packages {

If the generated .deb and .rpm packages could be output to dist/, that would be great!

Code quote:

function build_daemon_packages

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dist-assets/linux/daemon/postrm line 33 at r1 (raw file):

    remove_symlinks
    ;;
  # yum remove passes a 0

⛏️ dnf has replaced yum nowadays, right? I know that the comment is copy-pasted from the existing after-remove script, but it could still be improved:)

Suggestion:

  # dnf remove passes a 0

[MarkusPettersson98]

I think the code looks good!

@MarkusPettersson98 reviewed 5 files and made 1 comment.
Reviewable status: all files reviewed, 3 unresolved discussions (waiting on braydonf).

[braydonf]

Okay great. I've updated it to output to dist/. It will now also package for all specified targets, it was added in the process of getting filenames for the packages.

[MarkusPettersson98]

Amazing work! 👏

@MarkusPettersson98 reviewed 5 files and all commit messages, made 1 comment, and resolved 2 discussions.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on braydonf).

[MarkusPettersson98]

I'm working on including libmnl and libnftnl for riscv in another PR: #10076

Do you have everything you need then?:)

[braydonf]

Yup, great! Opened a PR that builds on that: #10078