fix cmake issue

gcontini

2020-10-13 583baf97b3776d61dbb4bbbc1f7df8fba7cfc543

 src/library/base/string_utils.cpp

@@ -13,7 +13,7 @@
#include <algorithm>
#include <stdexcept>
#include <regex>
#include "StringUtils.h"
#include "string_utils.h"

#ifdef _WIN32
#include <time.h>  //mktime under windows