$NetBSD: patch-configure,v 1.1 2016/12/16 08:11:55 manu Exp $

POSIXly correct test(1) for equality.

--- configure.orig	2016-12-14 11:06:15.000000000 +0100
+++ configure	2016-12-14 11:07:56.000000000 +0100
@@ -13966,9 +13966,9 @@
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for readline.h" >&5
 $as_echo_n "checking for readline.h... " >&6; }
 
-  if test "x$cross_compiling" == "xyes"; then
+  if test "x$cross_compiling" = "xyes"; then
       without_readline=yes
   fi
 
   if test "x$without_readline" != "xyes"; then