otafault: Move headers under otafault/.

Test: mmma bootable/recovery
Change-Id: I3ceb72f703c7c2857d656c137d71baa1fccd8238
diff --git a/otafault/test.cpp b/otafault/test.cpp
index 60c40e0..63e2445 100644
--- a/otafault/test.cpp
+++ b/otafault/test.cpp
@@ -20,7 +20,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include "ota_io.h"
+#include "otafault/ota_io.h"
 
 int main(int /* argc */, char** /* argv */) {
     int fd = open("testdata/test.file", O_RDWR);