autopsy: use patch DSL

Formula/autopsy.rb

@@ -9,6 +9,9 @@ class Autopsy < Formula
   depends_on 'afflib' => :optional
   depends_on 'libewf' => :optional
 
+  # fixes weird configure script that wouldn't work nicely with homebrew
+  patch :DATA
+
   def autcfg; <<-EOS.undent
     # Autopsy configuration settings
 
@@ -44,11 +47,6 @@ class Autopsy < Formula
     EOS
   end
 
-  def patches
-    # fixes weird configure script that wouldn't work nicely with homebrew
-    DATA
-  end
-
   def install
     (var+"lib/autopsy").mkpath
     mv 'lib', 'libexec'