Pass args in reinstall instead of using global args.

Library/Homebrew/reinstall.rb

@@ -18,7 +18,7 @@ module Homebrew
       backup keg
     end
 
-    build_options = BuildOptions.new(Options.create(Homebrew.args.flags_only), f.options)
+    build_options = BuildOptions.new(Options.create(args.flags_only), f.options)
     options = build_options.used_options
     options |= f.build.used_options
     options &= f.options