libx11: upgrade 1.8.4 -> 1.8.5

Bug fix release

 * autoconf & libtool updates (!187, !188)
 * Restore missing text in XSetScreenSaver man page (#187, !203)
 * Update am_ET.UTF-8 compose keys to use dead-vowel symbols,
   in coordination with xkeyboard-config 2.39 (!205)
 * Assorted updates to en_US.UTF-8 compose keys (!189, !195, !196, !198,
   !199, !200, !201, !207, !208, !209)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 4e931f49)
Signed-off-by: Steve Sakoman <steve@sakoman.com>