Update Formula: gd

Add pkg-config file for gd

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/gd.rb

@@ -3,13 +3,43 @@ require 'formula'
 class Gd <Formula
   url "http://www.libgd.org/releases/gd-2.0.36RC1.tar.gz"
   homepage "http://www.libgd.org"
+  head "http://bitbucket.org/pierrejoye/gd-libgd/"
   md5 "39ac48e6d5e0012a3bd2248a0102f209"
 
   depends_on 'jpeg' => :recommended
 
+  def patches
+    DATA
+  end
+
   def install
     ENV.libpng
+    inreplace "gdlib.pc", "PREFIX", prefix
     system "./configure", "--prefix=#{prefix}", "--with-freetype=/usr/X11"
     system "make install"
+    (lib+'pkgconfig').install "gdlib.pc"
   end
 end
+
+__END__
+diff --git a/gdlib.pc b/gdlib.pc
+new file mode 100644
+index 0000000..91fe011
+--- /dev/null
++++ b/gdlib.pc
+@@ -0,0 +1,15 @@
++prefix=PREFIX
++exec_prefix=${prefix}
++libdir=/${exec_prefix}/lib
++includedir=/${prefix}/include
++bindir=/${prefix}/bin
++ldflags=  -L/${prefix}/lib
++
++
++Name: gd
++Description: A graphics library for quick creation of PNG or JPEG images
++Version: 2.0.36RC1
++Requires:
++Libs: -L${libdir} -lgd
++Libs.private: -lXpm -lX11 -ljpeg -lfontconfig -lfreetype -lpng12 -lz -lm
++Cflags: -I${includedir}