[libcroco] build: rename configure.in into configure.ac

[Christian Persch <chpe src gnome org>]

commit 611f624a6e15065792b41eb5ce14811293f3fb0a
Author: Nuno Araujo <nuno araujo russo79 com>
Date:   Sat Jan 19 23:20:37 2013 +0100

    build: rename configure.in into configure.ac
    
    With the upcoming version of automake (1.14) the support
    for the configure.in file will be dropped.[1]
    
    [1]http://lists.gnu.org/archive/html/automake/2012-12/msg00038.html
    
    Bug #692111.

 autogen.sh                   |    2 +-
 configure.in => configure.ac |    0
 2 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index d1b7b0b..201e39d 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -8,7 +8,7 @@ PKG_NAME="libcroco"
 
 REQUIRED_AUTOMAKE_VERSION=1.7
 
-(test -f $srcdir/configure.in \
+(test -f $srcdir/configure.ac \
   && test -f $srcdir/README \
   && test -f $srcdir/src/cr-parser.h) || {
     echo -n "**Error**: Directory "\`$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