Keg-only fontconfig for Leopard.

Leopard provides fontconfig 2.4.x, but advertises it in the .pc file
as 2.6.0. This causes problems, so we provide a keg-only formula for this.

Formula/fontconfig.rb

@@ -0,0 +1,17 @@
+require 'formula'
+
+class Fontconfig <Formula
+  url 'http://fontconfig.org/release/fontconfig-2.8.0.tar.gz'
+  homepage 'http://fontconfig.org/'
+  md5 '77e15a92006ddc2adbb06f840d591c0e'
+
+  # Leopard comes with 2.4.x, which is too old for many packages.
+  def keg_only?
+    :provided_by_osx
+  end
+
+  def install
+    system "./configure", "--disable-dependency-tracking", "--prefix=#{prefix}"
+    system "make install"
+  end
+end