New formula: agedu

From the home page:

    agedu: a Unix utility for tracking down wasted disk space

This program is similar to du, but also reports the age of the large
data.  This allows you to find folders full of data that _haven't been
accessed in a while_.

Closes Homebrew/homebrew#17887.

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

Formula/agedu.rb

@@ -0,0 +1,19 @@
+require 'formula'
+
+class Agedu < Formula
+  homepage 'http://www.chiark.greenend.org.uk/~sgtatham/agedu/'
+  url 'http://www.chiark.greenend.org.uk/~sgtatham/agedu/agedu-r9723.tar.gz'
+  version 'r9723'
+  sha1 '35425ade20051f00235fe58729093249f2685de3'
+
+  def install
+    system "./configure", "--disable-debug", "--disable-dependency-tracking",
+                          "--prefix=#{prefix}"
+    system "make install"
+  end
+
+  test do
+    system "#{bin}/agedu", "-s", "."
+    File.exist? "agedu.dat"
+  end
+end