Avoid Xorg build dependency

The only purpose of this dependency is to determine the location and
version of the X server.  Ideally there would be configuration options
for this, but for lack thereof, set our values in the fallback handler.

0001-xorg-detect.patch

@@ -0,0 +1,19 @@
+Avoid the Xorg build-time dependency, as we already know the answers
+to the questions that are trying to be determined.
+
+diff --git a/meson.build b/meson.build
+index bf0e58506..7d8f964c3 100644
+--- a/meson.build
++++ b/meson.build
+@@ -92,8 +92,9 @@ if find_x_server_out != ''
+ else
+   # what to do, what to do, this is wrong, but this just sets the
+   # defaults, perhaps this user is cross compiling or some such
+-  x_path = '/usr/bin/X11:/usr/X11R6/bin:/opt/X11R6/bin'
+-  x_bin = '/usr/bin/X'
++  x_path = '/usr/bin'
++  x_bin = '/usr/bin/Xorg'
++  xserver_has_listen = true
+ endif
+ xdmcp_dep = cc.find_library('Xdmcp', required: get_option('xdmcp'))
+ if xdmcp_dep.found() and get_option('tcp-wrappers')

gdm.spec

@@ -24,6 +24,7 @@ Source6:        gdm.sysusers
 Patch:          0001-udev-Stick-with-wayland-on-hybrid-nvidia-with-vendor.patch
 Patch:          0001-Honor-initial-setup-being-disabled-by-distro-install.patch
 Patch:          0001-data-add-system-dconf-databases-to-gdm-profile.patch
+Patch:          0001-xorg-detect.patch
 
 BuildRequires:  dconf
 BuildRequires:  desktop-file-utils
@@ -46,10 +47,8 @@ BuildRequires:  pkgconfig(ply-boot-client)
 BuildRequires:  pkgconfig(systemd)
 BuildRequires:  pkgconfig(x11)
 BuildRequires:  pkgconfig(xau)
-BuildRequires:  pkgconfig(xorg-server)
 BuildRequires:  systemd-rpm-macros
 BuildRequires:  which
-BuildRequires:  xorg-x11-server-Xorg
 BuildRequires:  yelp-tools
 
 Provides: service(graphical-login) = %{name}