ideviceinstaller: add HEAD

Closes Homebrew/homebrew#19063.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Formula/ideviceinstaller.rb

@@ -5,11 +5,21 @@ class Ideviceinstaller < Formula
   url 'http://www.libimobiledevice.org/downloads/ideviceinstaller-1.0.1.tar.bz2'
   sha1 '7dd57f5d6d4466d8eca5d28fef3c22033b2af2da'
 
+  head 'http://cgit.sukimashita.com/ideviceinstaller.git'
+
   depends_on 'pkg-config' => :build
   depends_on 'libimobiledevice'
   depends_on 'libzip'
 
+  if build.head?
+    depends_on 'autoconf' => :build
+    depends_on 'automake' => :build
+    depends_on 'libtool' => :build
+  end
+
   def install
+    system "./autogen.sh" if build.head?
+
     system "./configure", "--disable-dependency-tracking",
                           "--prefix=#{prefix}"
     system "make install"