generate packages targeting FreeBSD

[shiftkey]

Reported downstream: desktop/dugite#154

This requires:

• a FreeBSD CI platform (or equivalent) that can be used to build PRs and validate changes
• the ability to publish tagged builds to GitHub
• scripts to build and package on FreeBSD

[arajkumar]

Hey @shiftkey,

Sorry for the delay. Why can't we simply fallback to system installed git on unsupported platforms like FreeBSD? Looks like none of the CI services(circleci, travis) are supporting FreeBSD as of now.

[arrowd]

I just bumped into this problem when porting Logseq to FreeBSD.

The previous comment makes a lot of sense to me. Let the software use Git from $PATH if the bundled binaries can't be found.