Fix binwalk unbrewed libs

Fix https://github.com/Homebrew/homebrew/issues/30025.
Mind converting this to the new `patch` syntax?

```ruby
  # fixes for build system and dep libs
  patch do
    url "https://gist.github.com/balr0g/96445b5ecf22ddf0a54c/raw/e0e6b5de56d8cb1dbc2a6b93cd724d051f98317a/binwalk-head-201140711-c.patch"
    sha1 "da39a3ee5e6b4b0d3255bfef95601890afd80709"
  end

   # fixes for files getting installed outside prefix
  patch do
    url "https://gist.github.com/balr0g/e3a5c97151b6c03619b3/raw/2a67afc3613b435ef785b18ff1ed44b676576dbf/binwalk-1.3.0-setup.patch"
    sha1 "da39a3ee5e6b4b0d3255bfef95601890afd80709"
  end
```

You can place the patches in the stable and head blocks instead of using conditionals, too.