Update jpeg to 8b & build Universal

Needed to allow wine, which is i386-only, to make use of its dependency on jpeg.

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

Formula/jpeg.rb

@@ -1,15 +1,16 @@
 require 'formula'
 
 class Jpeg <Formula
-  url 'http://www.ijg.org/files/jpegsrc.v8a.tar.gz'
+  url 'http://www.ijg.org/files/jpegsrc.v8b.tar.gz'
-  version '8a'
+  version '8b'
-  md5 '5146e68be3633c597b0d14d3ed8fa2ea'
+  md5 'e022acbc5b36cd2cb70785f5b575661e'
   homepage 'http://www.ijg.org'
-  
+
   aka :libjpeg, :libjpg
 
   def install
-    system "./configure", "--prefix=#{prefix}"
+    ENV.universal_binary
+    system "./configure", "--prefix=#{prefix}", "--disable-dependency-tracking"
     system "make install"
   end
-end
+end