config/withdir: Make case for --without-X more clear

* Will display a message acknowledging the configure setting
   instead of 'simple ok' which is misleading.

Signed-off-by: Joshua Hursey <jhursey@us.ibm.com>

config/opal_check_withdir.m4

@@ -8,6 +8,7 @@ dnl                         reserved.
 dnl Copyright (c) 2008-2009 Cisco Systems, Inc.  All rights reserved.
 dnl Copyright (c) 2015      Research Organization for Information Science
 dnl                         and Technology (RIST). All rights reserved.
+dnl Copyright (c) 2017      IBM Corporation.  All rights reserved.
 dnl $COPYRIGHT$
 dnl
 dnl Additional copyrights may follow
@@ -19,8 +20,10 @@ dnl
 # ----------------------------------------------------
 AC_DEFUN([OPAL_CHECK_WITHDIR],[
     AC_MSG_CHECKING([--with-$1 value])
-    AS_IF([test "$2" = "yes" || test "$2" = "no" || test "x$2" = "x"],
+    AS_IF([test "$2" = "no" ],
-          [AC_MSG_RESULT([simple ok (unspecified)])],
+          [AC_MSG_RESULT([simple no (specified --without-$1)])],
+          [AS_IF([test "$2" = "yes" || test "x$2" = "x"],
+                 [AC_MSG_RESULT([simple ok (unspecified value)])],
                  [AS_IF([test ! -d "$2"],
                         [AC_MSG_RESULT([not found])
                          AC_MSG_WARN([Directory $2 not found])
@@ -35,4 +38,6 @@ AC_DEFUN([OPAL_CHECK_WITHDIR],[
                        )
                  ]
                 )
+          ]
+         )
 ])dnl