otafault: Move headers under otafault/.

Test: mmma bootable/recovery
Change-Id: I3ceb72f703c7c2857d656c137d71baa1fccd8238
diff --git a/updater/blockimg.cpp b/updater/blockimg.cpp
index fe21dd0..696cddf 100644
--- a/updater/blockimg.cpp
+++ b/updater/blockimg.cpp
@@ -51,7 +51,7 @@
 
 #include "edify/expr.h"
 #include "error_code.h"
-#include "ota_io.h"
+#include "otafault/ota_io.h"
 #include "print_sha1.h"
 #include "rangeset.h"
 #include "updater/install.h"