Added missing px4_ prefixes

NuttX build required missing px4_ prefix for systemreset and task_spawn_cmd

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

src/modules/attitude_estimator_q/attitude_estimator_q_main.cpp

@@ -202,7 +202,7 @@ int AttitudeEstimatorQ::start() {
 	ASSERT(_control_task == -1);
 
 	/* start the task */
-	_control_task = task_spawn_cmd("attitude_estimator_q",
+	_control_task = px4_task_spawn_cmd("attitude_estimator_q",
 				       SCHED_DEFAULT,
 				       SCHED_PRIORITY_MAX - 5,
 				       2500,

src/systemcmds/tests/test_mount.c

@@ -288,7 +288,7 @@ test_mount(int argc, char *argv[])
 	fsync(fileno(stdout));
 	fsync(fileno(stderr));
 	usleep(50000);
-	systemreset(false);
+	px4_systemreset(false);
 
 	/* never going to get here */
 	return 0;