Add a patch file, which should have been committed in the previous commit.

textproc/asciidoc/patches/patch-ab

@@ -0,0 +1,13 @@
+$NetBSD: patch-ab,v 1.1 2008/12/04 04:05:39 minskim Exp $
+
+--- asciidoc.py.orig	2008-12-03 18:56:53.000000000 -0800
++++ asciidoc.py
+@@ -124,7 +124,7 @@ def file_in(fname, directory):
+         directory = os.getcwd()
+     else:
+         assert os.path.isdir(directory)
+-        directory = os.path.abspath(directory)
++        directory = os.path.realpath(directory)
+     fname = os.path.realpath(fname)
+     return os.path.commonprefix((directory, fname)) == directory
+