dialog: fixup ncurses config script

Point the build to the proper ncurses config script by using
$(NCURSES_CONFIG_SCRIPTS) from the ncurses package directly.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/dialog/dialog.mk

@@ -17,6 +17,6 @@ ifneq ($(BR2_ENABLE_LOCALE),y)
 DIALOG_DEPENDENCIES += libiconv
 endif
 
-DIALOG_CONF_OPT += NCURSES_CONFIG=$(STAGING_DIR)/usr/bin/ncurses5-config
+DIALOG_CONF_OPT += NCURSES_CONFIG=$(STAGING_DIR)/usr/bin/$(NCURSES_CONFIG_SCRIPTS)
 
 $(eval $(autotools-package))