usbmuxd: Add HEAD

Closes Homebrew/homebrew#11803.

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

Formula/usbmuxd.rb

@@ -5,6 +5,8 @@ class Usbmuxd < Formula
   url 'http://marcansoft.com/uploads/usbmuxd/usbmuxd-1.0.7.tar.bz2'
   md5 '6f431541f3177fa06aa6df9ceecb2da0'
 
+  head 'http://cgit.sukimashita.com/usbmuxd.git', :using => :git
+
   depends_on 'cmake' => :build
   depends_on 'libusb'
   depends_on 'libplist'