Added patch needed by new make target.

Author: oubiwann

patches/graphviz-includes.diff

@@ -0,0 +1,15 @@
+diff --git a/setup.py b/setup.py
+index 524dad7..f88d2f8 100644
+--- a/setup.py
++++ b/setup.py
+@@ -38,8 +38,8 @@ define_macros = []
+ #include_dirs='/usr/include/graphviz'
+ 
+ # OSX, Linux, alternate location
+-#library_dirs='/usr/local/lib/graphviz'
+-#include_dirs='/usr/local/include/graphviz'
++library_dirs='/usr/local/lib/graphviz'
++include_dirs='/usr/local/include/graphviz'
+ 
+ # OSX (Fink)
+ #library_dirs='/sw/lib/graphviz'