Integrated cmake_hexagon for qurt build

Still a WIP since the IDL file needs to be replace with the
muorb IDL file.

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

src/platforms/qurt/px4_layer/px4_qurt_tasks.cpp

@@ -363,7 +363,6 @@ static void timer_cb(void *data)
 
 int px4_sem_timedwait(px4_sem_t *sem, const struct timespec *ts)
 {
-	void *result;
 	work_s _hpwork = {};
 
 	// Create a timer to unblock