Allow builds with glibc 2.20.
Based on a patch by Peter Hutterer <peter.hutterer@who-t.net>.
See <https://raw.githubusercontent.com/openembedded/oe-core/master/meta/recipes-graphics/xorg-driver/xf86-input-synaptics/always_include_xorg_server.h.patch>.

--- xf86-video-vmware-13.0.2/vmwgfx/vmwgfx_overlay.c.~1~	2014-03-20 09:15:03.000000000 -0400
+++ xf86-video-vmware-13.0.2/vmwgfx/vmwgfx_overlay.c	2014-12-19 02:31:34.759122552 -0500
@@ -35,6 +35,8 @@
  */
 
 
+#include <xorg-server.h>
+
 #include "xf86xv.h"
 #include "fourcc.h"
 #define debug_printf(...)