otafault: Move headers under otafault/.

Test: mmma bootable/recovery
Change-Id: I3ceb72f703c7c2857d656c137d71baa1fccd8238
diff --git a/applypatch/applypatch.cpp b/applypatch/applypatch.cpp
index 51bf393..729d2a9 100644
--- a/applypatch/applypatch.cpp
+++ b/applypatch/applypatch.cpp
@@ -39,7 +39,7 @@
 #include <openssl/sha.h>
 
 #include "edify/expr.h"
-#include "ota_io.h"
+#include "otafault/ota_io.h"
 #include "print_sha1.h"
 
 static int LoadPartitionContents(const std::string& filename, FileContents* file);