Add support for FreeBSD

[mfechner]

I manage the gitlab package for FreeBSD.
Gitlab started to use zoekt for an indexer.

While I try to create a package for FreeBSD, I get the error message:

Acquiring build lock
# github.com/sourcegraph/zoekt/index
vendor/github.com/sourcegraph/zoekt/index/merge.go:152:20: undefined: NewIndexFile
vendor/github.com/sourcegraph/zoekt/index/read.go:634:16: undefined: NewIndexFile
vendor/github.com/sourcegraph/zoekt/index/read.go:723:14: undefined: NewIndexFile
Releasing build lock

The problem is related to this line:
https://github.com/sourcegraph/zoekt/blob/main/index/indexfile.go#L15

Do you see a problem to add support for FreeBSD?

Thanks
Matthias

[linear]

SPLF-1286 Add support for FreeBSD