apktool: use resource

Formula/apktool.rb

@@ -1,21 +1,17 @@
 require 'formula'
 
-class ApktoolExecutables < Formula
-  url 'https://android-apktool.googlecode.com/files/apktool-install-macosx-r05-ibot.tar.bz2'
-  sha1 'c2fb262760ccd27530e58ccc4bbef4d4a7b0ab39'
-end
-
 class Apktool < Formula
   homepage 'http://android-apktool.googlecode.com/'
   url 'https://android-apktool.googlecode.com/files/apktool1.5.2.tar.bz2'
   sha1 '2dd828cf79467730c7406aa918f1da1bd21aaec8'
 
-  def install
-    libexec.install 'apktool.jar'
+  resource 'exes' do
+    url 'https://android-apktool.googlecode.com/files/apktool-install-macosx-r05-ibot.tar.bz2'
+    sha1 'c2fb262760ccd27530e58ccc4bbef4d4a7b0ab39'
+  end
 
-    ApktoolExecutables.new.brew do
-      libexec.install 'aapt', 'apktool'
-    end
+  def install
+    libexec.install 'apktool.jar', resource('exes')
 
     # Make apktool look for jar and aapkt in libexec
     inreplace "#{libexec}/apktool" do |s|