sometimes we just need to gorram make a link

Signed-off-by: Thom May <thom@chef.io>

lib/omnibus/builder.rb

@@ -660,6 +660,9 @@ module Omnibus
       command = "link `#{source}' to `#{destination}'"
       build_commands << BuildCommand.new(command) do
         Dir.chdir(software.project_dir) do
+          if options.delete(:unchecked)
+            FileUtils.ln_s(source, destination, options)
+          end
           files = FileSyncer.glob(source)
           if files.empty?
             log.warn(log_key) { "no matched files for glob #{command}" }