fixed some Variable copied when it could be moved Coverity warnings (danmar#8265)

Author: firewave

lib/importproject.cpp

@@ -104,7 +104,7 @@ std::string ImportProject::collectArgs(const std::string &cmd, std::vector<std::
         return "Missing closing quote in command string";
 
     if (!arg.empty())
-        args.push_back(arg);
+        args.push_back(std::move(arg));
 
     return "";
 }

lib/tokenize.cpp

@@ -1043,7 +1043,7 @@ void Tokenizer::simplifyTypedef()
                 if (t != ts.nameToken())
                     existing_data_type += t->str() + " ";
             }
-            numberOfTypedefs[ts.name()].insert(existing_data_type);
+            numberOfTypedefs[ts.name()].emplace(std::move(existing_data_type));
             continue;
         }
     }