kconfig: remove CONFIG_ from string constants

Having the CONFIG_ prefix in string constants gets in the way of
using a run-time-defined CONFIG_ prefix.

Fix that by using temp growable strings (gstr) in which we printf
the text.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/scripts/kconfig/nconf.c b/scripts/kconfig/nconf.c
index 87d4b15..261f926 100644
--- a/scripts/kconfig/nconf.c
+++ b/scripts/kconfig/nconf.c
@@ -696,13 +696,18 @@
 {
 	struct symbol **sym_arr;
 	struct gstr res;
+	struct gstr title;
 	char *dialog_input;
 	int dres;
+
+	title = str_new();
+	str_printf( &title, _("Enter %s (sub)string to search for "
+			      "(with or without \"%s\")"), CONFIG_, CONFIG_);
+
 again:
 	dres = dialog_inputbox(main_window,
 			_("Search Configuration Parameter"),
-			_("Enter " CONFIG_ " (sub)string to search for "
-				"(with or without \"" CONFIG_ "\")"),
+			str_get(&title),
 			"", &dialog_input_result, &dialog_input_result_len);
 	switch (dres) {
 	case 0:
@@ -712,6 +717,7 @@
 				_("Search Configuration"), search_help);
 		goto again;
 	default:
+		str_free(&title);
 		return;
 	}
 
@@ -726,6 +732,7 @@
 	show_scroll_win(main_window,
 			_("Search Results"), str_get(&res));
 	str_free(&res);
+	str_free(&title);
 }