update for new audio.h header location

Change-Id: Ic4c62c4037800802427eb7d3c7f5eb8b25d18876
Signed-off-by: Dima Zavin <dima@android.com>
diff --git a/core/jni/android_media_AudioSystem.cpp b/core/jni/android_media_AudioSystem.cpp
index 09c0953..246c0e5 100644
--- a/core/jni/android_media_AudioSystem.cpp
+++ b/core/jni/android_media_AudioSystem.cpp
@@ -30,7 +30,7 @@
 #include <media/AudioSystem.h>
 #include <media/AudioTrack.h>
 
-#include <hardware/audio.h>
+#include <system/audio.h>
 #include <hardware/audio_policy.h>
 
 // ----------------------------------------------------------------------------