glamor/xwayland: Define EGL_NO_X11

Define EGL_NO_X11 everywhere were we also define MESA_EGL_NO_X11_HEADERS,
EGL_NO_X11 is the MESA_EGL_NO_X11_HEADERS equivalent for the egl headers
shipped with libglvnd.

This fixes the xserver not building with the libglvnd-1.2.0 headers:

In file included from /usr/include/EGL/eglplatform.h:128,
                 from /usr/include/epoxy/egl_generated.h:11,
                 from /usr/include/epoxy/egl.h:46,
                 from glamor_priv.h:43,
                 from glamor_composite_glyphs.c:25:
/usr/include/X11/Xlib.h:222:2: error: conflicting types for 'GC'
  222 | *GC;
      |  ^~
In file included from glamor.h:34,
                 from glamor_priv.h:32,
                 from glamor_composite_glyphs.c:25:
../include/gcstruct.h:282:3: note: previous declaration of 'GC' was here
  282 | } GC;
      |   ^~

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
(cherry picked from commit 741bd73429)

glamor/glamor_egl.h

@@ -28,6 +28,7 @@
 #define GLAMOR_EGL_H
 
 #define MESA_EGL_NO_X11_HEADERS
+#define EGL_NO_X11
 #include <epoxy/gl.h>
 #include <epoxy/egl.h>
 #include <glamor_egl_ext.h>

glamor/glamor_priv.h

@@ -40,6 +40,7 @@
 #include <epoxy/gl.h>
 #ifdef GLAMOR_HAS_GBM
 #define MESA_EGL_NO_X11_HEADERS
+#define EGL_NO_X11
 #include <epoxy/egl.h>
 #endif
 

hw/xwayland/xwayland-glamor-eglstream.c

@@ -33,6 +33,7 @@
 #include "wayland-eglstream-controller-client-protocol.h"
 
 #define MESA_EGL_NO_X11_HEADERS
+#define EGL_NO_X11
 #include <glamor_egl.h>
 #include <glamor.h>
 #include <glamor_transform.h>

hw/xwayland/xwayland-glamor-gbm.c

@@ -36,6 +36,7 @@
 #include <drm_fourcc.h>
 
 #define MESA_EGL_NO_X11_HEADERS
+#define EGL_NO_X11
 #include <gbm.h>
 #include <glamor_egl.h>
 

hw/xwayland/xwayland-glamor.c

@@ -26,6 +26,7 @@
 #include "xwayland.h"
 
 #define MESA_EGL_NO_X11_HEADERS
+#define EGL_NO_X11
 #include <glamor_egl.h>
 
 #include <glamor.h>