Fix info/options for new options dsl

Library/Homebrew/cmd/info.rb

@@ -90,7 +90,7 @@ module Homebrew extend self
     history = github_info(f)
     puts history if history
 
-    unless f.options.empty?
+    unless f.build.empty?
       require 'cmd/options'
       ohai "Options"
       Homebrew.dump_options_for_formula f

Library/Homebrew/cmd/options.rb

@@ -31,7 +31,7 @@ module Homebrew extend self
   end
 
   def dump_options_for_formula f
-    f.options.each do |k,v|
+    f.build.each do |k,v|
       puts k
       puts "\t"+v
     end