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-geode-2.11.16/src/lx_memory.c.~1~	2014-07-16 16:59:37.000000000 -0400
+++ xf86-video-geode-2.11.16/src/lx_memory.c	2014-12-19 00:38:11.753388268 -0500
@@ -23,6 +23,8 @@
  * software without specific prior written permission.
  */
 
+#include <xorg-server.h>
+
 #include "xf86.h"
 #include "geode.h"
 #include "cim/cim_regs.h"
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