[gnome-main-menu] Update autogen.sh for configure.ac rename

[Stefano Karapetsas <stefanok src gnome org>]

commit 0a4b7ca97a61a6cd46723969de432ee61c75b6f1
Author: Stefano Karapetsas <stefano karapetsas com>
Date:   Sat Jan 25 18:53:55 2014 +0100

    Update autogen.sh for configure.ac rename

 autogen.sh |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index fed9e16..d1bb9e2 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -6,7 +6,7 @@ test -z "$srcdir" && srcdir=.
 
 PKG_NAME="gnome-main-menu"
 
-(test -f $srcdir/configure.in \
+(test -f $srcdir/configure.ac \
   && test -f $srcdir/autogen.sh) || {
     echo -n "**Error**: Directory "\`$srcdir\'" does not look like the"
     echo " top-level $PKG_NAME directory"