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/modules/mc_pos_control/mc_pos_control_main.cpp

@@ -333,12 +333,6 @@ private:
 namespace pos_control
 {
 
-/* oddly, ERROR is not defined for c++ */
-#ifdef ERROR
-# undef ERROR
-#endif
-static const int ERROR = -1;
-
 MulticopterPositionControl	*g_control;
 }