Bug#872778: xterm -lc (with UTF-8 locale) cannot properly copy some utf-8 unicode chars

[積丹尼 Dan Jacobson]

These three show as boxes in xterm.
T> &show(0x1f618, "FACE THROWING A KISS");
T> &show(0x7522, "CJK UNIFIED IDEOGRAPH-7522");
T> &show(0x9109, "CJK UNIFIED IDEOGRAPH-9109");
Yes, copying them from xterm to elsewhere reveals them.