GenerateTerms: Use std::unordered_map also for libstdc++ (through unique_ptr)
GenerateTerms: Use std::unordered_map also for libstdc++ (through unique_ptr)

Kronuz/Xapiand,Kronuz/Xapiand,Kronuz/Xapiand,Kronuz/Xapiand,Kronuz/Xapiand,Kronuz/Xapiand