merge libXau 1.0.9 and libfontenc 1.1.4.

Don't use atexit(3) to free the buffer. Use a destructor instead so we don't
segv if someone dlopened and dlclosed the library. Should fix:
http://mail-index.netbsd.org/tech-userlevel/2018/12/27/msg011624.html

initial import of libXau-1.0.8

initial import of libXau-1.0.3