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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<tr><td><span title='2020-10-02 00:30:43 +0200'>2020-10-02</span></td><td><a href='/guix/commit/gnu/packages/rdf.scm?id=1aa9f2cfde650d9164ea06b3a248a3fc8298271e'>gnu: sord: Update to 0.16.6.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
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<tr><td><span title='2020-07-12 23:08:15 +0200'>2020-07-12</span></td><td><a href='/guix/commit/gnu/packages/rdf.scm?id=b0e7b6992f3f845e83cfbca4d700b51dba50b4d5'>gnu: Remove ".git" from "https://github/…/….git".</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
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<tr><td><span title='2020-05-01 17:32:08 +0200'>2020-05-01</span></td><td><a href='/guix/commit/gnu/packages/rdf.scm?id=7e5c7677056610fa45dde7415ccbf07525d00e79'>gnu: serd: Update to 0.30.4.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-04-23 13:33:09 +0200'>2020-04-23</span></td><td><a href='/guix/commit/gnu/packages/rdf.scm?id=030f6f489fe9544f35ebaf95135acd1dd67ce63f'>Merge branch 'master' into core-updates</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-04-21 12:41:47 +0300'>2020-04-21</span></td><td><a href='/guix/commit/gnu/packages/rdf.scm?id=0e64f12db526dbb87ec0517b02ff2f997ab7ab63'>gnu: Add python-rdflib-jsonld.</a><span class='msg-avail'>...</span></td><td>Pjotr Prins</td></tr>
<tr><td><span title='2020-04-21 12:38:19 +0300'>2020-04-21</span></td><td><a href='/guix/commit/gnu/packages/rdf.scm?id=5d29808beaa0e68f33504c3a3bf6373b36dcabfa'>gnu: rdf.scm: Use license: prefix.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>