thrift: use new dsl

Formula/thrift.rb

@@ -3,7 +3,7 @@ require 'formula'
 class Thrift < Formula
   homepage 'http://thrift.apache.org'
   url 'http://www.apache.org/dyn/closer.cgi?path=thrift/0.8.0/thrift-0.8.0.tar.gz'
-  md5 'd29dfcd38d476cbc420b6f4d80ab966c'
+  sha1 '1d652d7078d9cc70e2a45d3119b13e86ebd446da'
 
   head 'http://svn.apache.org/repos/asf/thrift/trunk'
 
@@ -15,7 +15,7 @@ class Thrift < Formula
     # isn't needed anymore at all but I can't test that.
     cp "#{MacOS::X11.share}/aclocal/pkg.m4", "aclocal" if MACOS_VERSION < 10.7
 
-    system "./bootstrap.sh" if ARGV.build_head?
+    system "./bootstrap.sh" if build.head?
 
     # Language bindings try to install outside of Homebrew's prefix, so
     # omit them here. For ruby you can install the gem, and for Python
@@ -39,8 +39,8 @@ class Thrift < Formula
     Most language bindings were not installed. You may like to do the
     following:
 
-        gem install thrift
-        easy_install thrift
+      gem install thrift
+      easy_install thrift
 
     If anyone figures out the steps to reliably build a set of bindings, please
     open a pull request.