fix initraj.cc: use qualified motion/motion.h path for ini/ directory

emc/ini/ does not have -Iemc/motion in its compile flags, so the flat
"motion.h" include fails on ARM and clang builds.

Author: grandixximo

src/emc/ini/initraj.cc

@@ -25,7 +25,7 @@
 #include "nml_intf/emcglb.h"		/*! \todo TRAVERSE_RATE (FIXME) */
 #include "inihal.hh"
 #include <rtapi_string.h>
-#include "motion.h"       // For emcmotConfig, emcmot_config_t
+#include "motion/motion.h"       // For emcmotConfig, emcmot_config_t
 
 // Userspace kinematics for trajectory planning
 #include "userspace_kinematics.hh"