libdc1394: fix build on 10.9

Fixes Homebrew/homebrew#24142.

Formula/libdc1394.rb

@@ -5,14 +5,23 @@ class Libdc1394 < Formula
   url 'http://downloads.sourceforge.net/project/libdc1394/libdc1394-2/2.2.1/libdc1394-2.2.1.tar.gz'
   sha1 'b92c9670b68c4e5011148f16c87532bef2e5b808'
 
+  depends_on :libtool
+  depends_on :automake
+  depends_on :autoconf
+
   def patches
+    p = []
     # fix issue due to bug in OSX Firewire stack
     # libdc1394 author comments here:
     # http://permalink.gmane.org/gmane.comp.multimedia.libdc1394.devel/517
-    DATA
+    p << DATA
+
+    # Backport of upstream fixes for building on OS X
+    p << "https://gist.github.com/jacknagel/7395159/raw/3ba722636fb898d210170f5d8a494977c89626b7/libdc1394.patch"
   end
 
   def install
+    system "autoreconf", "-fvi"
     system "./configure", "--disable-dependency-tracking",
                           "--prefix=#{prefix}",
                           "--disable-examples",