mad: update include path

Author: redchenjs

components/mad/synth_stereo.c

@@ -31,7 +31,7 @@
 # include "string.h"
 //# include "lpc_io.h"
 
-# include "tasks/audio_render.h"
+# include "user/audio_render.h"
 
 #define TAG "libmad"