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_att_control/mc_att_control_main.cpp

@@ -291,12 +291,6 @@ private:
 namespace mc_att_control
 {
 
-/* oddly, ERROR is not defined for c++ */
-#ifdef ERROR
-# undef ERROR
-#endif
-static const int ERROR = -1;
-
 MulticopterAttitudeControl	*g_control;
 }
 
@@ -1025,4 +1019,4 @@ int mc_att_control_main(int argc, char *argv[])
 
 	warnx("unrecognized command");
 	return 1;
-}
+}