two-lame: use new dsl

Formula/two-lame.rb

@@ -5,14 +5,13 @@ class TwoLame < Formula
   url 'http://downloads.sourceforge.net/twolame/twolame-0.3.13.tar.gz'
   sha1 '3ca460472c2f6eeedad70291d8e37da88b64eb8b'
 
-  depends_on 'libsndfile' if ARGV.include? '--frontend'
+  option 'frontend', 'Build the twolame frontend using libsndfile'
 
-  def options
-    [['--frontend', 'Build the twolame frontend using libsndfile']]
-  end
+  depends_on 'libsndfile' if build.include? 'frontend'
 
   def install
-    system './configure', "--prefix=#{prefix}", '--disable-dependency-tracking'
+    system "./configure", "--disable-dependency-tracking",
+                          "--prefix=#{prefix}"
     system 'make install'
   end
 end