add message when no UI for menuselect is present

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@126153 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Makefile

@@ -833,6 +833,10 @@ menuselect: menuselect/cmenuselect menuselect/nmenuselect menuselect/gmenuselect
 		$(MAKE) cmenuselect; \
 	elif [ -x menuselect/gmenuselect ]; then \
 		$(MAKE) gmenuselect; \
+	else \
+		echo "No menuselect user interface found. Install ncurses," \
+		echo "newt or GTK libraries to build one and re-rerun" \
+		echo "'make menuselect'." \
 	fi
 
 cmenuselect: menuselect/cmenuselect menuselect-tree