llvmpipe: Refer my udis86 branch which decodes more opcodes.

src/gallium/drivers/llvmpipe/README

@@ -38,9 +38,10 @@ Requirements
 
  - Linux
  
- - udis86, http://udis86.sourceforge.net/
+ - udis86, http://udis86.sourceforge.net/ . Use my repository, which decodes
+   opcodes not yet supported by upstream.
  
-     git clone git://udis86.git.sourceforge.net/gitroot/udis86
+     git clone git://people.freedesktop.org/~jrfonseca/udis86
      cd udis86
      ./configure --with-pic
      make