Updating libcurses, libterminfo and terminfo.

The three are updated together as they are tightly coupled.

Change-Id: I9e1f07b6adc6e8ae10833e6f1402f8472d2d34b8

import elf-only -lcurses

. abandons mixer, gomoku, talk, talkd, top from base system
. compile top with clang so no ack-compiled program
needs -lcurses any more