xorg-server: Update version from 1.20.2 to 1.20.3

Announcement:

> Fixes CVE-2018-14665 (local file overwrite bugs), and a trivial fix in
> fbdevhw initialization. All users are advised to upgrade. Thanks to
> Narendra Shinde and Thomas Hoger for the report, and Matthieu Herrb for
> the fix.
>
> Adam Jackson (1):
>       xserver 1.20.3
>
> Matthieu Herrb (2):
>       Disable -logfile and -modulepath when running with elevated privileges
>       LogFilePrep: add a comment to the unsafe format string.
>
> Peter Hutterer (1):
>       xfree86: fix readlink call

We are probably not affected, as our Xorg binary is not Suid.

    $ ls -lh /usr/bin/Xorg
    -rwxr-xr-x 1 root root 273 Oct 25 18:58 /usr/bin/Xorg

From *X.Org security advisory: October 25, 2018*:

> Workaround
> ==========
>
> If a patched version of the X server is not available, X.Org
> recommends to remove the setuid bit (ie chmod 755) of the installed
> Xorg binary.  Note that this can cause issues if people are starting
> the X window system using the 'startx', 'xinit' commands or variations
> thereof.
>
> X.Org recommends the use of a display manager to start X sessions,
> which does not require Xorg to be installed setuid.

xorg-server.be0

@@ -1,6 +1,6 @@
 #!/usr/bin/env beesh
 
-# BEE_VERSION xorg-server-1.20.2-0
+# BEE_VERSION xorg-server-1.20.3-0
 
 ## this file was created by bee init and should be executed to build a
 ## bee-package. (Additional hints are located at the end of this file.)