Merge valgrind support backto master

[hhdang6637]

The ini class still need implemented but we need valgrind-3.13.0 for master branch a little bit sooner

[hhdang6637]

@tranconghau

You can help to implement following functions:

bool get_string(const char *section, const char *key, std::string &value);
bool get_bool(const char *section, const char *key, bool &value);
bool get_int(const char *section, const char *key, int &value);
bool get_uint16(const char *section, const char *key, uint16_t &value);

bool set_string(const char *section, const char *key, std::string &value);
bool set_bool(const char *section, const char *key, bool value);
bool set_int(const char *section, const char *key, int value);
bool set_uint16(const char *section, const char *key, uint16_t value);