[metacity] misc: rename configure.in to configure.ac

[Alberts Muktupāvels <muktupavels src gnome org>]

commit da3ce140be9e352ce74cec03d635018fc8c4d245
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Tue Jun 3 15:05:40 2014 +0300

    misc: rename configure.in to configure.ac

 autogen.sh                   |    2 +-
 configure.in => configure.ac |    0
 2 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index 75f1cfb..eec808b 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -7,7 +7,7 @@ test -z "$srcdir" && srcdir=.
 PKG_NAME="metacity"
 REQUIRED_AUTOMAKE_VERSION=1.10
 
-(test -f $srcdir/configure.in \
+(test -f $srcdir/configure.ac \
   && test -d $srcdir/src) || {
     echo -n "**Error**: Directory "\`$srcdir\'" does not look like the"
     echo " top-level metacity directory"
diff --git a/configure.in b/configure.ac
similarity index 100%
rename from configure.in
rename to configure.ac