Fix Makefile, which missed including a necessary library for compiling in the
0.5.0 release.

See https://github.com/jordansissel/xdotool/pull/81 for more information.

--- xdotool-3.20150503.1/Makefile	2014-10-20 13:05:34.000000000 -0700
+++ xdotool-3.20150503.1/Makefile	2016-02-05 14:44:18.652734272 -0800
@@ -28,7 +28,7 @@
 CFLAGS+=-g # TODO(sissel): Comment before release
 CFLAGS+=$(CPPFLAGS)
 
-DEFAULT_LIBS=-L/usr/X11R6/lib -L/usr/local/lib -lX11 -lXtst -lXinerama
+DEFAULT_LIBS=-L/usr/X11R6/lib -L/usr/local/lib -lX11 -lXtst -lXinerama -lxkbcommon
 DEFAULT_INC=-I/usr/X11R6/include -I/usr/local/include
 
 XDOTOOL_LIBS=$(shell pkg-config --libs x11 2> /dev/null || echo "$(DEFAULT_LIBS)")  $(shell sh platform.sh extralibs)<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
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<tr><td><span title='2020-04-21 00:06:40 +0200'>2020-04-21</span></td><td><a href='/guix/commit/gnu/services/spice.scm?id=7d903d2ff7e17406c0650541f35e37a99dab8759'>services: Don't use the deprecated 'make-forkexec-constructor' call.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-01-26 18:45:09 +0100'>2020-01-26</span></td><td><a href='/guix/commit/gnu/services/spice.scm?id=9a5edd02405b9ee70bc2f93b91483e8da2eadfd3'>services: Fix typo in spice-vdagent-service.</a><span class='msg-avail'>...</span></td><td>Damien Cassou</td></tr>