Set AUTOCONF variable when maintainer-mode is not used

Fixes build issue introduced in 8894bad3 when configure.ac is altered
and maintainer-mode is not enabled.

ChangeLog

@@ -1,5 +1,8 @@
 2013-12-16  Allan McRae  <allan@archlinux.org>
 
+	* configure.ac: Set AUTOCONF when maintainer-mode is not used.
+	* configure: Regenerated.
+
 	* sysdeps/x86_64/multiarch/ifunc-impl-list.c: Update file name.
 
 	[BZ #14120]

configure

@@ -5198,6 +5198,8 @@ $as_echo "$libc_cv_autoconf_works" >&6; }
   if test "x$AUTOCONF" = xno; then
     aux_missing="$aux_missing autoconf"
   fi
+else
+  AUTOCONF=no
 fi
 
 test -n "$critic_missing" && as_fn_error $? "

configure.ac

@@ -1028,6 +1028,8 @@ if test "x$maintainer" = "xyes"; then
   if test "x$AUTOCONF" = xno; then
     aux_missing="$aux_missing autoconf"
   fi
+else
+  AUTOCONF=no
 fi
 
 test -n "$critic_missing" && AC_MSG_ERROR([