radare2: fix audit

radare2:
  * `revision` (line 34) should be put before `stable block` (line 24)

Formula/radare2.rb

@@ -20,6 +20,7 @@ end
 class Radare2 < Formula
   desc "Reverse engineering framework"
   homepage "http://radare.org"
+  revision 1
 
   stable do
     url "http://cloud.radare.org/get/1.1.0/radare2-1.1.0.tar.gz"
@@ -31,8 +32,6 @@ class Radare2 < Formula
     end
   end
 
-  revision 1
-
   bottle do
     sha256 "1375576749f424a8dc5bdc7fb6ee33bb69e6aa3616a19485ca8bdddcbfb31f4e" => :sierra
     sha256 "4e4d174472f126e9914dce0ca3848ce2b3448cde908bb02c0dfef65465cd9431" => :el_capitan