Add homebrew tap

[mgrebenets]

More like a feature request.
It would be nice to have a homebrew tap with formula for this tool, to be able to install it via HOmebrew.

[keith]

Here's a quick head only formula if someone wants to push it to a tap or something:

class BitcodeRetriever < Formula
  desc "URL extractor/launcher"
  homepage "https://github.com/AlexDenisov/bitcode_retriever"
  head "https://github.com/AlexDenisov/bitcode_retriever.git"

  depends_on "libxml2"

  def install
    system "make"
    bin.install "build/bitcode_retriever"
  end
end