[pygobject] Lower autoconf dependency to 2.68 again

[Martin Pitt <martinpitt src gnome org>]

commit 76a3acebf73f930c541d0f30249f67d254f948ab
Author: Martin Pitt <martinpitt gnome org>
Date:   Fri Nov 9 06:41:58 2012 +0100

    Lower autoconf dependency to 2.68 again

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 0824be6..f53d80f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 -*- mode: m4 -*-
-AC_PREREQ([2.69])
+AC_PREREQ([2.68])
 
 # The version of python used is determined by the executable pointed to by the
 # --with-python switch, or if that's not set, by the PYTHON environment