[nautilus] build: Rename configure.in to configure.ac

[Javier JardÃn <jjardon src gnome org>]

commit 4c339f925369fe2590f4704118414778546182d4
Author: Javier JardÃn <jjardon gnome org>
Date:   Thu Jan 3 17:31:24 2013 +0000

    build: Rename configure.in to configure.ac
    
    The long-deprecated 'configure.in' name for the Autoconf input file
    will be dropped in future version of automake

 autogen.sh                   |    2 +-
 configure.in => configure.ac |    0
 2 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index d71a355..f7ca60e 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -6,7 +6,7 @@ test -z "$srcdir" && srcdir=.
 
 PKG_NAME="nautilus"
 
-(test -f $srcdir/configure.in \
+(test -f $srcdir/configure.ac \
   && test -f $srcdir/README \
   && test -d $srcdir/libnautilus-private) || {
     echo -n "**Error**: Directory "\`$srcdir\'" does not look like the"
diff --git a/configure.in b/configure.ac
similarity index 100%
rename from configure.in
rename to configure.ac