Merge remote repo native into ext/native/.

ext/native/tools/audiotool.cpp

@@ -0,0 +1,17 @@
+// TODO
+
+#include <stdio.h>
+
+#include "audio/wav_load.h"
+#include "base/logging.h"
+
+
+struct AudioClip {
+  int length;
+
+};
+
+
+int main(int argc, char **argv) {
+  CHECK(argc == 3); 
+}