mu: Update to 0.9.7

Closes Homebrew/homebrew#7945.

Signed-off-by: Charlie Sharpsteen <source@sharpsteen.net>

Formula/mu.rb

@@ -1,15 +1,10 @@
 require 'formula'
 
 class Mu < Formula
-  url 'http://mu0.googlecode.com/files/mu-0.9.6.tar.gz'
+  url 'http://mu0.googlecode.com/files/mu-0.9.7.tar.gz'
+  sha1 '8641d579a770d59124b72433712841736d326ca6'
   homepage 'http://www.djcbsoftware.nl/code/mu/'
-  head 'http://mu0.googlecode.com/files/mu-0.9.7-pre.tar.gz'
-
-  if ARGV.build_head?
-    md5 '811e896894f789ef1b87316d4322b412'
-  else
-    md5 '72fdf907f2b7922a54c8d14bc4b06ccf'
-  end
+  head 'git://gitorious.org/mu/old.git'
 
   depends_on 'gettext'
   depends_on 'glib'