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/test/json_parse_unittest.cpp b/test/json_parse_unittest.cpp
index 3345163..f8967de 100644
--- a/test/json_parse_unittest.cpp
+++ b/test/json_parse_unittest.cpp
@@ -1,4 +1,4 @@
-#include "build/buildjson.hpp"
+#include "buildjson/buildjson.hpp"
 #include "errors/exception.hpp"
 
 #include <gmock/gmock.h>