Add missing headers for istream::getline

Change-Id: I09b0bd75dc6a44011df0179638857740d0c2636e
(cherry picked from commit 5021d59dfbed53039ac6f20e198dc3684245b495)

src/lib_json/json_reader.cpp

diff --git a/src/lib_json/json_reader.cpp b/src/lib_json/json_reader.cpp
index c5111f8..6136230 100644
--- a/src/lib_json/json_reader.cpp
+++ b/src/lib_json/json_reader.cpp
@@ -9,6 +9,8 @@
 #include <json/value.h>
 #include "json_tool.h"
 #endif // if !defined(JSON_IS_AMALGAMATION)
+#include <iostream>
+#include <fstream>
 #include <utility>
 #include <cstdio>
 #include <cassert>