Change folder name build to buildjson

- If change to use meson build, meson will automake build folder,
  and this will overwrite the origin folder and miss the buildjson
  files.

Signed-off-by: Harvey Wu <Harvey.Wu@quantatw.com>
Change-Id: Idfc4852bf56ed8f6c04e1b4be78ce40e08539132
diff --git a/main.cpp b/main.cpp
index 81c85a6..796c066 100644
--- a/main.cpp
+++ b/main.cpp
@@ -16,7 +16,7 @@
 
 #include "config.h"
 
-#include "build/buildjson.hpp"
+#include "buildjson/buildjson.hpp"
 #include "conf.hpp"
 #include "dbus/dbusconfiguration.hpp"
 #include "interfaces.hpp"