libx11: Fix for CVE-2023-43785 CVE-2023-43786 and CVE-2023-43787

import patches from ubuntu to fix
 CVE-2023-43785
 CVE-2023-43786
 CVE-2023-43787

Upstream-Status: Backport [import from ubuntu https://git.launchpad.net/ubuntu/+source/libx11/tree/debian/patches?h=ubuntu/focal-security
Upstream commit
https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/6858d468d9ca55fb4c5fd70b223dbc78a3358a7f
&
https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/204c3393c4c90a29ed6bef64e43849536e863a86
&
https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/73a37d5f2fcadd6540159b432a70d80f442ddf4a
&
https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/b4031fc023816aca07fbd592ed97010b9b48784b
&
https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/7916869d16bdd115ac5be30a67c3749907aea6a0]

Reference: https://launchpad.net/ubuntu/+source/libx11/2:1.6.9-2ubuntu1.6



Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>