package/wmctrl: x-includes and x-libraries must be set for cross-compiling
set x-includes and x-libraries configure option for cross-compiling.
wmctrl can use poisoned paths if these options are not passed to
configure script.
Fixes:
http://autobuild.buildroot.net/results/7e5/7e5cba8a5650a00e10d1a5528f38cb2bf772aee1
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Jérôme Pouiller <jezz@sysmic.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>