Use GetPath with file names over accessing member variables

src/benchmarks/match.cpp

@@ -30,7 +30,7 @@ int main(int argc, const char *argv[]) try
 
     // Configure based on a .osrm base path, and no datasets in shared mem from osrm-datastore
     EngineConfig config;
-    config.storage_config = {argv[1]};
+    config.storage_config.UseDefaultOutputNames(argv[1]);
     config.use_shared_memory = false;
 
     // Routing machine with several services (such as Route, Table, Nearest, Trip, Match)