* Adds toolchain for freebsd.
* Address buildifier lint warnings.
* Use /usr/bin/env bash
* Leave the Linux-specific shebang alone.
* Adds note about Bazel CI issue requesting for FreeBSD support and experimental status.
* Fix typo.
* Clean up trailing whitespace.
* Updates bazel-skylib version for tests to pass on FreeBSD.
* Update foreign_cc/repositories.bzl
Co-authored-by: UebelAndre <github@uebelandre.com>